Sjoukje Maria Diderika Troelstra-Bokma de Boer, better known under her pseudonym Nienke van Hichtum, was a well-known Frisian Dutch children's author and translator. From 1888 to 1904, she was married to the socialist leader Pieter Jelles Troelstra. The couple had two children: a daughter, Dieuwke and a son, Jelle. Her son Jelle Troelstra (1891–1979) was a sculptor and graphic designer.
