In his second lecture for Torah in Motion on Rabbi Moses Kunitz, professor Marc B. Shapiro talks about rabbis with non-Jewish names. There was a tosafist (medieval Talmudic commentator) named Rabbi Peter.
“I spell my name with a ‘c’. Marc. So it’s not the Greek way, it’s the Latin way. The Greek way is the New Testament. Plenty of good Jews are named Marc or Peter or Matthew. I haven’t seen any good Jews named Luke.”
Orthodox rabbi Fabian Schonfeld — a student of Rav J.B. Soloveitchik — gave the invocation at the 1984 Republican National Convention in Dallas.
The name “Fabian” is goyish. Rabbi Schonfeld got grief for having a Gentile’s first name.