He was the first son of Ivan I, Danilovich Kalita, grand prince of Moscow and
Yelyena. He married first about in 1333 to Anastasia, daughter of Gedimin,
grand prince of Lithuania, then second about in 1342 to Yevpraksia, daughter of
Fedor Svyatoslavich, prince of Smolensk, then third in about 1345 to Maria,
daughter of Aleksandr Mikhailovich, grand prince of
Tver. His sons from the first marriage were Vasilii (d 1338); Konstantin, crown
prince of Moscow (d 1341). His sons from the third marriage were Daniil,
Mikhail, Ivan and Semyon, prince of Moscow all of whom died without heirs. He
was grand prince of Moscow (1340-53) and grand prince of Vladimir (1341-53).
Simyeon died in the terrible plague in Moscow in 1353 along with his sons. His
daughter, Vasilisa, married prince Mikhail
Vasil'yevich of Kashin. The throne passed to his younger brother,
Ivan II. While the plague proved to be a tragedy for
Semyon and his family, it tourned out well for Muscovy in that it eliminated so
much of the usual division of the territories into newly independent udels
according to the will of the prince. Thus it gave Ivan II quite a good start.
The family is shown on this chart.