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From Rodovid EN

Lineage	Рябовы
Sex	Male
Full name (at birth)	Иосиф(Осип) Данилович Рябов
Parents ♂ Данила Леонтьевич Рябов [Рябовы] b. 1834 ♀ Татьяна Федоровна ? (Рябова) [?]

From grandparents to grandchildren