Serkiz

Serkiz (Russian: "Серкиз") was a Tatar prince. Born in the mid-14th century in the Golden Horde, he became an Orthodox Christian and was baptised under the name Ivan Ivan Serkizov. He died late in the 14th century in Muscovy (now Moscow).
Biography.
There is no contemporary record of Serkiz' existence. Later records state that he led an army in the service of the Grand Duke Dmitry Donskoy. He had at least one child, (died 1380).
Legacy.
Four villages in the Moscow region were named "Cherkizovo" or "Serkizovo" in his honour by Dmitry Donskoy. Serkiz is the ancestor of the Starkov family.