"Ixokai" is not a race but rather an ethnoreligious title.  It is a portmonteau of "Ixo", (holy) and "Kairza", (people). The Ixokai are multiracial, but Ixokai culture is ultimately modeled after Huëy culture, the dominant and founding population of the Ixokai. The Huëy people (specifically the Huëy tribe Talantro Theix) were the ones initially anointed as the Ixokai by Sleuon out of all the nations.  So Ixokai people were originally only Huëy. Then as the Huëy conquered and assimilated Gentile populations, those Gentiles became Ixokai themselves. 

You can become Ixokai through assimilation into Ixokai culture which entails being Ixenthacron (first and foremost), learning to speak Ixokai, taking up Ixokai culture, taking up the 5 Statutes of the Anointed (special laws that only apply to he Ixokai), and becoming part of the Ixokai State, renouncing all previous national loyalties.  

Ixokai identity and citizenship are not permanent and can be lost with apostasy: once you become an apostate you cease to be Ixokai until reversion.  Ixokai identity is inseparable from Sleuon and by extension Ixenthacronism. Ixenthacron people can be either Ixokai or Gentiles. Ixenthacron Gentiles are called "Gentiles in the Faith" and disbelieving Gentiles are called "heathens".  Together, the Ixokai and the Gentiles in the Faith make up the faith community of Ixenthacronism. An Ixenthacron person can be either Ixokai or a Gentile, but an Ixokai person can only be Ixenthacron.

Ixokai is the official language of the Ixokai civilization, but it is actually the ancient Huëy language Hueyen which was renamed "Ixokai" after the Talantro Theix were anointed. Hueyen is the language the gods speak and is the language the Ixokai runic alphabet is a writing system for. 

Despite Ixokai not referring to any particular race, there are still nonetheless Ixokai races. The Ixokai races are races where half, more than half, or the entirety of the race (with a few exceptions) is part of the Ixokai covenant, manifested as the Ixokai State. For most of these races it means that there are no longer any Gentiles left of that race.

The Ixokai races and the exceptions are:

• Ixokai Huëy- the founding race and the majority. Ixokai culture is ultimately just Huëy culture. The Huëy were quite fragmented, divided into various tribes and subraces like the Ixotlan Theix/ “Antaphelites” (which the Talantro Theix belonged to), the Ipoxalon Theix, and the Hexipol Theix. The Talantro Theix ultimately had to unite all the Antaphelite tribes before then conquering the rest of the Huëy peoples. The Huëy are part of the Theixon race family which also includes the Fauraxen (native race of Fauramax) and even the Athnotans: the dominant ethnic group of Athnogaula. So the 3 main Theixon majority nations are the Ixokai Maxotlan, Fauramax, and Athnogaula.

• Ixokai Tlao- a black-skinned race and the dominant race in the Antelic South. They were gradually and arduously conquered across an enormous amount of time. The Tlao are the second largest ethnic group in the country and they play and instrumental role in governance and science. Since they are the most numerous group after the Huëy, their incorporation into the covenant community was a major victory for the Ixokai State.

• Kaltheix- the dominant race of the Antelic North, brutally conquered by the Ixokai in Classical Antiquity. The Kaltheix, along with the Salvex, were among the races most brutally enslaved by the Ixokai State. They are white with blue eyes and blonde hair.

• Ixokai Andrax- a major, black-skinned race of the Antelic South, specifically the Southwest. Before Ixokai colonization, they committed genocide against the Palpatec. They helped the Ixokai on several of their campaigns against the Tlao. Eventually they too were incorporated.

• Ixokai Thalix- the dominant indigenous race of the Thasta Keon Coast in the Antelic East that was gradually conquered over an enormous period of time. Before Ixokai colonization, they committed genocide against the Lau. Unlike isolated races like the Kaltheix and Salvex, the Thalix actually had extensive contact with the Ixokai before they were gradually conquered.

• Ixokai Salvex- the dominant race of the Antelic West, native to the Kantra Salvex desert. Like the Kaltheix, they were violently incorporated into the Ixokai State during Classical Antiquity.

• Ixokai Arinth- one of the indigenous races of the Antelic Center that has the misfortune of having to share the Center with the Huëy. They were one of the first non-Huëy peoples to be incorporated into the Ixokai State, way back in the Formative Period. The Huëy committed genocide against them following the Saga of the Princes.

• Sereven- the “wilderpeople” are a collection of minorities native to the Antelic North. They were subjugated by the Kaltheix long before the Ixokai arrived. When the Ixokai conquered the Kaltheix, the Sereven were dragged into the covenant along with them. The Sereven races whose entire populations are Ixokai are:

  • Akopet- the largest Sereven race. The Akopet helped the Ixokai in their conquest of the Kaltheix, procuring a favorable position in the following Ixokai colonial state. 

  • Silnem- a martial race used by the Kaltheix as mercenaries and slaves. They assimilated well into Ixokai culture but were nonetheless subordinate.

  • Hasgathite- a tribal, martial race the Kaltheix had trouble keeping under control. Often slaves and considered inferior. They also helped the Ixokai invading forces while at the same time resisting them. They are white with striking red hair.

• Mariphet- a race native to the Antelic West that was conquered gradually over hundreds of years beginning shortly after Classical Antiquity. They were slaves and subordinates of the Salvex and were subsequently liberated by the Ixokai conquest of Kantra Pharon (the Salvex nation at the time).

• Ixokai Mau- the native race of the Kaplo Thalex Archipelago. They were colonized first by Irkenau then by the Ixokai State. They are now a minority in their homeland.

• Palpatec- a native race of the Antelic Southwest which suffered genocide at the hands of the Andrax. The Ixokai eventually conquered them after the Andrax were already conquered.

• Arphimac- a minor race of the Antelic West which helped the Ixokai in their conquest of the Salvex during Classical Antiquity. For this reason they received preferential treatment in the colonial system that followed.

• Maimori- a native race of the Mezat Valley in the Southwest. 

• Ithuluc- a southern, black-skinned race native to the island of Ithulutlan which the Ixokai conquered for resource extraction. The Ixokai saw them as primitive and impressionable since by the time of their conquest the Ixokai already had firearms.

• Ralaphet- a minor, mercantile race of the Antelic West that was conquered later than the rest. 

• Taxtl- a minor race of the Antelic Center native to the Taxtla Valley.

• Ilurax- a minor race native to the Mezat Valley.

• Ixokai Lau- one of the native races of the Thasta Keon Coast. The Thalix genocided them gradually before the Ixokai eventually conquered them.

• Kaukat- a minor race of the Antelic Center with a noticeably distinct culture from the rest. The Arinth originally interfaced with them, usually through trade and subjugation. After the Arinth fell, the Kaukat remained relatively independent for a long while before they too were conquered.

Exceptions:

• Spolan/Kortoxen- a major race of the Antelic North, specifically the northeastern landmass of Kortox Taelax. The southern half of the island was conquered by the Ixokai just a few centuries ago. The northern half remains independent and Gentile. The race itself is called Kortoxen, but the southern variant is called Spolan and the northern is Sargan. The Kortoxen are an exception because the Ixokai half of the Kortoxen is 90 million while the independent nation of Sargatlan (also called Kortoxlau) has a population of 100 million. So only roughly 47% of the total Kortoxen population is Ixokai while the rest remain Gentiles. The Kortoxen are extremely intelligent and rival (sometimes even surpass) the Huëy in psychometrics and cognitive ability. They are viewed extremely favorably by the Ixokai. The Kortoxen are incredibly tall and blonde with sharp, almond-shaped and sometimes even monolid blue eyes. Their eyes make them very distinct compared with the other northern races and the rest of the Antelic peoples.

• Kisnithan- a Sereven race from the far Antelic North. The reason they are an exception is that there are fewer than a million of them within the Ixokai State while the independent Kisnithan nation of Hibeyan has a population of 3 million. So the majority of Kisnithans in the world remain Gentiles, but the ones within the Ixokai Maxotlan remain as Ixokai as all the others. The Kisnithans were a feared, cannibalistic race the Kaltheix regarded as exotic, savage, and dangerous. The Ixokai in turn treated them very harshly for their cannibalism. 

As can be seen, some races have the name "Ixokai" attached at the front (like the Ixokai Huëy, Ixokai Tlao, etc) while others do not (Kaltheix, Akopet, Mariphet, etc.). This has nothing to do with which races are fully Ixokai and which are not but rather is just a naming convention which has been added inconsistently applied. Originally, it meant which Gentile populations were considered most linguistically, culturally, and morally similar to the Ixokai (which at the time were almost entirely Huëy). The addition of "Ixokai" to the name/new name was a primitive taxonomic label essentially saying, "this is a sub-branch of the same family the Huëy belong to".  However, since the Huëy had very specific racial ancestry, there was no term that could really be used for something that was related to the Huëy without being from the same lineage. So, the term "Ixokai" was used since it already was supposed to be universal while remaining Huëy-related. This was added selectively and inconsistently however, usually withheld for populations deemed extremely distant or savage. The Kaltheix are a major example. Though the Kantraphyr people were seen as rebellious heathens, the fact they also wore cotton clothing, were linguistically related, and shared many recognizable cultural practices with the Huëy granted them the new name "Ixokai Salvex" when they were conquered. The Kaltheix, on the other hand, were much more alien due to their isolation: they wore liner and wool, ate different animals (sheep), had unique linguistics, and had more exotic practices than not + the brutality of their false religion with Gasgamak cost them their new name. 

Today however, these labels mean nothing since racial scientists and anthropologists use a much more accurate and comprehensive racial taxonomy. Peoples like the Kaltheix are just as Ixokai as all the others, and even more Ixokai than recently added peoples (like the Ixokai Mau) who did receive the name.  The labels are still in use simply because the names have been around too long to change. Going forward, new populations that are added will not receive the Ixokai prefix but if they do, it will only be to signal that their previous national identities have been erased, and not as part of an obsolete taxonomy. The Mariphet, Kaltheix, Akopet, or any of the others will never have the prefix added not just because their names have already been cemented in time but also because there is no need to specify that they are Ixokai.