Stephen Timoshenko
Stepan Prokopovich Timoshenko (Ukrainian: Степан Прокопович Тимошенко, romanized: Stepan Prokopovych Tymoshenko, Ukrainian pronunciation: [steˈpan proˈkɔpoʋet͡ʃ tɪmoˈʃɛnko]; Russian: Степан Прокофьевич Тимошенко, romanized: Stepan Prokofyevich Timoshenko, [sʲtʲɪˈpan prɐˈkofʲjɪvʲɪtɕ tʲɪmɐˈʂɛnkə]; December 22 [O.S. December 10] 1878 – May 29, 1972), later known as Stephen Timoshenko, was a Ukrainian and later an American engineer and academician. He is considered to be the father of modern engineering mechanics.