This Serbian-American inventor was a person you lived in volantary seculsion from who?
Nikola Tesla Nikola Tesla ( ; ; 10 July 1856 – 7 January 1943) was a Serbian-American inventor, electrical engineer, mechanical engineer, physicist, and futurist who is best known for his contributions to the design of the modern alternating current (AC) electricity supply system.
Nikola Grbović Nikola Grbović (; 1793–1806) was a Serbian "obor-knez" of the Kolubara "knežina" of the Valjevo "nahija" in the Sanjak of Smederevo, who later became a Serbian Revolutionary. He was born in Mratišić. He was active in the formation of the district and the Ottoman Serb civil army from 1793–94 to 1796, and took part in the operations against Janissary leader Osman Pazvantoğlu. At the end of November 1797 obor-knezes Aleksa Nenadović, Ilija Birčanin and Nikola Grbović from Valjevo brought their forces to Belgrade and forced the besieging janissary forces to retreat to Smederevo. He participated since the outbreak of the First Serbian Uprising, organizing a detachment of his "knežina" together with his son Milovan. He was a rebel delegate in the talks with Bekir Pasha in 1804. He participated in the liberation of Valjevo and in the first fights around Belgrade.