The Danielewicz family of Clan Ostoja originates probably from Russian boyar Daniel Aleksandrowicz's son Vladimir Danielewicz, that settled down in Lithuania.[1][2] Danielewicz is a patronymic surname, meaning descendants of Daniel or Danilo. The family is associated with the Clan of Ostoja and Ostoja Coat of Arms.
- ^ The Pskov 3rd Chronicle, 2nd edition by David Savignac, Beoulf Sons, Crofton 2016. Year 1434: That winter, on February 28, Prince Aleksandr Fedorovich and his entire household left Pskov for Moscow. He had been prince on three different occasions and had lived in Pskov for a total of twelve years. On that same day his son-in-law, Prince Vladimir Danielewicz, arrived in Pskov from Lithuania, where he had been living for the previous ten years. Vladimir Danielewicz was the prince of Pskov from the end of February 1434 to November 1435, and he was the Pskov viceregent of Grand Prince Vasily Vasilyevich from April 1436 until c. 1438/1439. PBS 2002, p. 95. 3. The grammar is fractured in this passage. The sense was restored by using the text of the account in the Pskov 1st Chronicle (p. 42) Names in Russia was patronymic, but in Lithuania, during 15th century and influence of Poland and also after the Union of Horodło, surnames was created.
- ^ According to Jan Ciechanowicz, in 15th century there was only one family noted with surname Danielewicz in Grand Duchy of Lithuania