Boonstra is a West Frisian toponymic surname, indicating an origin in the town of Oldeboorn or from near the river , after which the town was named.Boonstra at the Database of Surnames in The Netherlands. Notable people with the surname include:
Albert Boonstra (born 1957), Dutch swimmer Clarence A. Boonstra (1914–2006), American ambassador Cor Boonstra (1938–2025), Dutch businessman and chief executive Dirk Boonstra (1893–1944), Dutch police officer Lieuwe Dirk Boonstra (1905–1975), South African paleontologist Miranda Boonstra (born 1972), Dutch long-distance runner Tjabel Boonstra (1899–1968), Dutch cyclist Todd Boonstra (born 1961), American cross-country skier
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