Janko is a name that derives from a diminutive form of the name Jan (Slavic languages), Janez (Slovenian), János (Hungarian), and Yakov/Jacob (Ashkenazi Jewish). It also derives from the vernacular form of Latin Johannes. Notable people with the name include: Given name. Janko Benša (born 1977), Serbian distance runner. Janko Bobetko (1919–2003), Croatian general. Janko Brašić (1906–1994), Serbian naïve painter. Janko Drašković (1770–1856), Croatian politician. Janko Dreyer (born 1994), South African cricketer. Janko Gagić (died 1804), Serbian hajduk leader.
https://en.wikipedia.org/wiki/Janko