Дегтяревский (Дегтеревский) Иван Данилович
probably wife's 4×great-grandfather — possible father of Lyubov Ivanovna Kubekova
Collegiate registrar, lived in the military town of Novomirgorod, Kherson province; retired by 1856. Wife — Olimpiada Dorofeevna, son — the pharmacist Nikolai Ivanovich, born in 1844 (S514). That he was also the father of Princess Lyubov Ivanovna Kubekova, née Degterevskaya, is not yet proven: the rare surname and the patronymic match, but there is no record of her birth.