Sibling
each of two or more children having one or both parents in common; a brother or sister
https://www.yourdictionary.com/sibling
Step brother/sister
a son/daughter of one's step-parent by a relationship other than that with one's own father or mother
https://www.yourdictionary.com/articles/cultural-anthropology-terms
Uterine sister/brother
English term “uterine sister/brother” means relatives who have the same mother but different fathers. The term was first recorded in the English lexicon in 1610. It is derived from the French word “uterin” which means “bound by the womb”. Along with the terms “uterine sister/brother” there are terms showing the connection only on the maternal line
https://www.yourdictionary.com/search/result?q=uterine%20sister
German sister/brother
The term german sister/brother means “a brother or sister by both the father's and mother's sides, in contradistinction to an uterine brother, one by the mother only” [18]. According to the Etymological Dictionary of the English language, the English word “german” goes back to the Old French word “germain”, meaning “from the same parents”
https://www.yourdictionary.com/search/result?q=german%20sister
Cross-cousin
cross-cousin means “children of the opposite-gendered siblings of one's parents, e.g., mother's brother's and father's sister's children”
Parallel-cousin
the term “cousin” means “children of the same-gendered siblings of one's parents, e.g., mother's sister's and father's brother's children”
https://www.yourdictionary.com/search/result?q=paralell%20cosuin
Affinal
affinal means “members of one's kindred who are related through marriage and family formation” . The English term “affinity” goes back to the Old French term “afinite”, meaning “kinship by marriage”. It was first recorded in 1303. Since 1600 it has been figuratively used in chemistry and biology
https://www.yourdictionary.com/affinal
Patrilineal
patrilineal means “tracing kinship, inheritance, power through the male line”. According to the etymological dictionary the morpheme “patri” comes from the Latin morpheme and the second morpheme “lineal” from the Old French morpheme, which means “to bind”. The term “patrilineal” was first recorded in 1904
https://www.yourdictionary.com/patrilineal
Matrilineal
matrilineal means “descent traced exclusively through the female line” [18]. As the Etymological Dictionary indicates, the first morpheme “matri” is derived from the Latin morpheme “mater”. The term “matrilineal” was first recorded in 1897
https://grammar.yourdictionary.com/search/result?q=matrilineal
consanguineal means “members of one`s kindred who are related by blood”. The term was first recorded in 1380. The lexeme consanguineal derives its origin from the Latin lexeme “consanguinitatem.” According to the Etymological Dictionary, the term is derived from two morphemes: con “together” and sanguineus “by blood”. It implied that Roman individuals were of the same father and thus shared in the right to his inheritance
Bilineal
bilineal means “descent in which the individual figures kinship through both the father's and mother's descent group”. The morpheme “bi” is borrowed from Latin, where it means ‘two’, the second morpheme “lineal” is borrowed from Old French ‘lineal’, where it means ”to bind”.
