He was a son of Yurii
Dmitriyevich, appanage prince of Zvenigorod-Galich and Anastasia Yur'yevna,
princess of Smolensk. He was appanage prince of Galich and grand prince of
Moscow very briefly in 1446-47 during his war with grand prince
Vasilii II. He married in 1436 wiith Sofia, daughter
of Dmitrii Vasil'yevich, appanage prince of
Zaozersk. Their son was Ivan Shemyakin, prince of
Galich without udel. The family is shown on this
chart. Dmitrii simply would not give up, he repeatedly sought to overthrow
Vasilii, finally fleeing to Novgorod from whence he continued to launch raids.
He sought the assistance of King Casimir of Poland. Finally he was poisoned.