Original sentence: His father, Ivan Alexeevich Sikorsky, had a Russian and noble Polish () family background.Igor Ivanovich Sikorsky (, tr.Igor Sikorsky was born in Kiev, Russian Empire (present-day Ukraine), the youngest of five children.Igor Sikorsky's mother, Mariya Stefanovna Sikorskaya (née Temryuk-Cherkasova), was a physician who did not work professionally.Ígor' Ivánovič Sikórskij; May 25, 1889 – October 26, 1972), was a Russian American aviation pioneer in both helicopters and fixed-wing aircraft
Edited sentence: His father, Ivan Oleksiyovych Sikorsky, had a Russian and noble Polish () family background.Igor Sikorsky was born in Kyiv, Russian Empire (present-day Ukraine), the youngest of five children.Igor Sikorsky's mother, Mariya Stefanovna Sikorska (née Temryuk-Cherkasova), was a physician who did not work professionally.Ihor Ivanovich Sikorsky (Ukrainian: Ігор Іванович Сікорський , tr.Ígor' Ivánovič Sikórskij; May 25, 1889 – October 26, 1972), was a Ukrainian American aviation pioneer in both helicopters and fixed-wing aircraft