(35239) Ottoseydl = 1995 SH2 Otto Seydl (1884-1959), Czech populariser of astronomy, worked on stellar statistics and later on history of astronomy in Bohemia. He served as the director of the State Observatory in Klementinum in Prague (1939-1942 and 1945-1948). He was a member of the IAU and The Czech Astronomical Society.
A complete set of naming citations of the numbered minor planets is available in the Dictionary of Minor Planet Names, edited by Lutz Schmadel.