Princely Origins
By his sources' account, Andrew belonged to the Zaozersk princely line: his father was Prince Demetrius (Dimitri) Vasilievich of Lesser Zaozersk, a descendant of Prince Theodore Rostislavich of Smolensk and Yaroslavl, and his mother was Princess Maria. The accounts emphasize the deep piety of his parents, which they passed to their son.
One account relates that his father was killed in 1429 by Kazan Tatars during a raid and that his mother died of illness while Andrew was young, leaving him orphaned together with his brothers Symeon and Theodore and his sister Sophia.