Daniel of Moscow

Daniil Aleksandrovich (Russian: Даниил Александрович; 1261 – 5 March 1303), also known as Daniil of Moscow, was the youngest son of Alexander Nevsky and forefather of all Princes of Moscow. His descendants are known as the Daniilovichi. He has been locally approved for veneration in the Russian Orthodox Church, with feast days on 17 March and 12 September.

Source: Wikipedia — https://en.wikipedia.org/wiki/Daniel_of_Moscow