Fyodor Yurevich Prince of Sudka (c1445-1510)

He had two sons, both named Ivan: Ivan Fyodorovich "The Lame" and Ivan Fyodorovich "the Younger". After his death, his sons lost their appanage privileges, but kept their title of Princes Sludsky. Ivan Fyodorovich "The Lame" had only two daughters, while Ivan Fyodorovich "The Younger" died childless. Thus the lineage of the Princes Sludsky had no more male descendents.