Jansma

Jansma is a West Frisian patronymic surname cognate to "Johnson". People with this surname include:


 * Bintje Jansma (1888–1976), Dutch elementary school student after whom her teacher named the potato cultivar Bintje
 * Esther Jansma (born 1958), Dutch writer and archaeologist
 * (born 1962), Dutch bridge player
 * Kristopher Jansma (born 1982), American writer and novelist
 * Rik Jansma (born before 2006), Dutch chef and co-founder of the restaurant Basiliek in Harderwijk, Netherlands
 * Sijtse Jansma (1898–1977), Dutch tug of war competitor who competed in the 1920 Summer Olympics
 * Sybren Jansma (born 1982), Dutch bobsledder who has competed in the Winter Olympics
 * Timothy J. Jansma (1952–2006), American luthier