Latin
"Adeste Fideles" ("O Come, All Ye Faithful") attributed to John Francis Wade, Latin words translated by Frederick Oakeley c. 1743
"Angelus ad Virginem" 13th-c., or older.
"Dona nobis pacem" Perhaps Mozart A 3-voice round.
"Gaudete" ("Rejoice") sacred Christmas carol 1582 re-popularized by Steeleye Span (1973)
"Hodie Christus natus est" Jan Pieterszoon Sweelinck 1619 Originally published in Cantiones Sacrae
"In dulci jubilo" Heinrich Seuse 1328 Macaronic carol known in several translations; melody is also used for the English song "Good Christian Men, Rejoice" (aka, "Good Christian Friends, Rejoice").
"Laetabundus" attributed to Bernard of Clairvaux 12th-c.
"O Sanctissima" ("O du Fröhliche" or "Oh, How Joyfully")
Personent hodie 1582 Originally published in Finland, but with Latin lyrics
"Psallite, unigenito" Michael Praetorius 1609
First published in Musae Sioniae, sechster Theil
"Puer Natus in Bethlehem" Text early 13th-c. (or older); melody 14th-c.
Sped up version of a Gregorian chant.
"Pueri Concinite" Johann von Herbeck 1868 First performed in the Imperial Chapel, Vienna, on Christmas.
"Resonet in laudibus" 14th-c.
"Veni, veni Emmanuel" ("O come, O come Emmanuel")