Danielewicz is a patronymic surname, meaning descendants of Daniel or Danilo. Several Danielewicz families were members of Polish–Lithuanian Commonwealth nobility and their descendants continue to the present.
Spelling: Danielewicz, Danilewicz, Daniłowicz, Daniełowicz, Danieliwicz, Danielewitz and en: Danilovich.
The family in Russia that took their name after Daniel goes back to Daniel of Moscow.[1] Daniel's son Afanasy Danilovich was the Prince of Novgorod (died 1322) followed by Yury Danilovich, the prince of Moscow and Novgorod. In the 15th century another family is mentioned in the chronicles: Daniel Alexandrovich and his son Vladimir Danilovich were elected as princes of Pskov. Vladimir Danilovich (Danielewicz) settled down in Lithuania and his descendants used Ostoja Coat of Arms[2][3]
Furthermore, in the Armorial of Tadeusz Gajl there are more families of different clans listed with different spelling. Daniełowicz - clan Godziemba and Sas, Daniłowicz - clan Leliwa, Ostoja, Rola, Sas and Sulima, Danielewicz - clan Godziemba, Ostoja and Rola, Danilewicz - clan Boncza I, Leliwa, Ostoja, Prus I and Sas, Danieliwicz - clan Ostoja.[8]
All above are noble families of Danielewicz vel Danilewicz being part of different clans and not family related with each. Below, CoA of Rola, Sas, Grzymała, Godziemba, Sulima, Bończa, Prus and Ostoja.