First:
David,
Isaiah,
Elijah, and
Nathaniel are more biblical than Jewish.
Second: Plenty of non-Christians use
Christian names, plenty of people who haven't an ounce of Irish use Irish names.
Third: You seemed obsessed with a person's bacground - Italian heritage because she's slightly dark complected?
My sister is 2/3 Swedish, 1/3 English, and could easily pass for Hispanic.
But she most definatly isn't.
I hope to name my children
Ezra,
Liora,
Miriam,
Raphael,
Jonas, and love other very
Hebrew, Yiddish, and Judeo-Spanish names.