Tibor Sekelj (born 14 February, 1912 in Spišská Sobota, Poprad, present-day Slovakia; died 23 September, 1988 in Subotica, present day Serbia) was an explorer, Esperantist, writer and lawyer of Jewish descent. Sekelj's father was a veterinarian and the family moved very often. After several months they moved to Cheney (today Romania) and in 1922 they moved to Kikinda (in Vojvodina). Wikipedia
The definitive Wikipedia entry for Tibor Sekelj. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Tibor_Sekelj