Boris Mikhailovich

Boris Mikhailovich is, controversially, considered to have been Prince of Moscow from 1248 to 1263, preceding Daniil Aleksandrovich, who is more often named as the first Prince of Moscow.
Boris was the son of Mikhail Iaroslavich Khorobrit, who was the younger brother of Aleksandr Nevsky, and would thus have been Daniil's uncle. Boris' father was briefly Grand Prince of Vladimir in 1248, but Boris never seems to have held that title. Following Boris' death, Daniil took control of Moscow only in about 1283.