Wiki information Danylovich:

Roman Danylovich
Man, Person

Roman Danylovich, Prince of Black Ruthenia 1254–1258, Prince of Slonim?. He was born as a younger son of Danylo of Halych, a powerful prince of lands east from Poland and later king of those regions, which was most of the times called Volhynia or...

Irakli Danylovich

Irakli Danylovich was a Ruthenian prince.