[Opinions] Re: Jewish names from the city of prague
1. about the Falk/Yehoshua dichotomy, I commwnted down below.
2. you are right about the Yehudah Leon. the Shulchan Aruch (basic book in jewish law) also brings Leon as a nickname for Yehudah.
3. Aba Mari means "Father-Master". Mar in aramaic means Master, and is often used as an an honorific, both in the Talmud and in modern Hebrew. Aramaic soeaking christians in the middle east (Including Israel and Palestine) use the term Mar to refer to saints (Mar Sabba, Mar Elias, and so on).