Is this "Ya'ir ben Menasheh" of Bamidbar 32:41?
Radak: Yes. Really, he was from Yehudah. He is called Ben Menasheh because his mother was Bas Machir ben Menasheh. Because he captured [23] cities in Gil'ad (from Menasheh's portion), and it was his mother's Shevet, he stayed to live there, and it was an inheritance for him.
Radak, from Bava Basra 112a: No. He married a woman from Eretz Gil'ad. She died, and he inherited from her 23 cities 1 .
Malbim (21): Yes. He was attributed to his mother's Shevet, because he was not conceived amidst Kidushin. (This is why Yiftach's brothers told him that he will not inherit with them.) So I explained about the men who married Bnos Barzilai (refer to Ezra 2:62:1:3). This is why the coming verse says "Kol Eleh Bnei Machir." When Moshe gave Gil'ad to Machir, Ya'ir (who is also called Ben Menasheh due to his mother) conquered Chavos Ya'ir.
Due to Bnei Menasheh's protest, Hashem commanded that any woman who inherits must marry within her Shevet (Bamidbar 36:8)! That was only for that generation. And even in that generation, a woman not destined to inherit (e.g. she has brothers) could marry into another Shevet. If later her brothers die before their father, she can inherit, and her husband or son will inherit her. (PF)
