Danylo Ostrozky

Danylo (Andriy) Ostrozky (Ukrainian: Данило Острозький, Polish: Daniel Ostrogski, died after 1366) was probably Prince of Turaŭ, first Prince of Ostroh, and founder of the Ostrozky House.

It is not clear whether he was descendant of Pinsk–Turaŭ or Galicia–Volhynia branch of the Rurikid Dynasty. Some scholars claim that his grandfather was Vasilko Romanovich, Prince of Slonim and direct descendant of Roman of Galicia, others however claim his origin in line of Sviatopolk II of Kiev and suppose that his father was Danylo Dmytrovych. Kasper Niesiecki, an 18th-century writer, reported that "Daniel Vasilievich, son of Daniel of Galicia`s brother, first started to call himself Prince of Ostrog". He could be also direct grandson of Daniel of Galicia and son of Mstislav Danilovich.

Adam Naruszewicz wrote that Danylo Ostrozky was starost of Przemyśl, officer of Casimir III the Great when he inherited Galicia after the death of Boleslaw-Yuri II of Galicia. Daniel was probably only temporary supporting King Casimir, because in 1344 he called the Tatars to fight for Galicia in the Galicia–Volhynia Wars, like Dmytro Dedko who died in the same year. Finally Prince Danylo allied to Liubartas who also rivaled for Galicia with Tatars, Poles and Hungarians. He received Ostroh from Liubartas, King of Galicia–Volhynia, where he rebuilt the castle destroyed by the Tatars.

Was married to Wassilisa (?), father of Feodor Ostrozky and probably Wasyl.