>> So did Columbus have any Jewish members of his crew?
[So where is Mel Brooks now that we need him?]
Seriously, though, any Jews on the ship were without a doubt Sepharditos (Sephardic Jews). For a fascinating read, Google up “cryptic jews new mexico”. I own several books on this. When things got hot in the old country, they escaped to la Frontera (the frontier). (Who, us? Jews? Oy! - er, ah - ha ha... don’t be silly.)
Sephardic Jews coming over with the Conquistadors would explain how Jewish Genes got into the Native American blood line.