House vs family Ostrogski might correct me but Jogaila has not been and even if he would hawe been smoking dope he would not could imagine to be a member of szlachta And Ostrogski family does not qualify to be szlachta even since they were orthodox Lithuanian nobility probably for quite long time A House since you did ask me  IMO no Family  yes See Radvila family and there is no house despite the Grand DuchessQeen Barbara Radziwi Best regards