A princess of Suzdal in the house of Moscow
Eudokia was the daughter of Dmitry Konstantinovich, Grand Prince of Suzdal and Nizhny Novgorod. Her marriage to Dmitry Donskoy bound together two of the leading princely houses of north-eastern Rus' and helped quiet the rivalry between Moscow and Suzdal during the decades in which Moscow rose to primacy among the Russian principalities.
Within the Moscow court she came under the spiritual influence of leading churchmen of her age. The sources name Saint Alexis, Metropolitan of Moscow, and Saint Sergius of Radonezh, who by tradition baptized one of her sons, among those who guided her household.