Boris Davydovich of Dmitrov

Boris Davydovich was a Rurikid prince, a son of Davyd Konstantinovich of Galich and Dmitrov and grandnephew of Alexander Nevsky. In 1280, after his uncle Vasily Konstantinovich died, the family principality was divided: his elder brother Fyodor took Galich and Boris received Dmitrov as his appanage.

He ruled Dmitrov for more than half a century and died in the Golden Horde in 1334, after which his son Dmitry probably succeeded him.