ἀνεψιός G431
anepsiós · an-eps'-ee-os · Noun Masculine
from Α (as a particle of union) and an obsolete (a brood); properly, akin, i.e. (specially) a cousin:--sister's son.
1 Occurrence in the King James Bible
Colossians 4:10Aristarchus my fellowprisoner saluteth you, and Marcus, sister’s son to Barnabas, (touching whom ye received commandments: if he come unto you, receive him;)