Who is Bruver?

I see no evidence of a character by the name of Bruver.

Yitzchak is the butcher who is hopes to marry Gitl, though she has no interest in him. Obviously interested in her, he bends to any of her wishes, hoping to please her. He is the only prisoner who manages to escape during a breakout attempt and joins a resistance movement to fight the Nazis. He eventually moves to Israel and becomes a politician, joining the Knesset, the Israeli Senate.