Jonker () is a Dutch surname. It is also a variation of the title jonkheer. The name can be occupational of origin, indicating an ancestor who was or worked for a jonkheer, or toponymical, e.g. referring to a house named De Jonker.Jonker at the Database of Surnames in The Netherlands. People with the surname include:

Andries Jonker (born 1962), Dutch football player and manager Catholijn Jonker (born 1967), Dutch computer scientist Charles Jonker (1933–1991), South African racing cyclist Christiaan Jonker (born 1986), South African cricketer Henk Jonker (1912–2002), Dutch photographer Ingrid Jonker (1933–1965), South African poet Ingrid Jonker Prize, literary prize for the best Afrikaans or English poetry debut work Ingrid Jonker (film), Dutch English-language film about her life Jacobus Jonker (fl. 1996), South African paralympic athlete Johannes Jonker (born 1994), South African rugby player JW Jonker (born 1987), South African rugby player Kees Jonker (1909–1987), Dutch competitive sailor Kelly Jonker (born 1990), Dutch field hockey player Kobus Jonker (fl. 2000), South African paralympic athlete Kobus "Donker" Jonker, former head of the South African Police Service Occult Related Crimes Unit and a figure in the Satanic panic (South Africa) Louis Jonker (1962), South African biblical scholar and linguist Margo Jonker (born 1954), American softball coach Marius Jonker (born 1968), South African rugby referee Patrick Jonker (born 1969), Dutch-born Australian racing cyclist Patrick Jonker Veloway, Australian bikeway named for him Robert James Jonker (born 1960), American (Michigan) judge Patrick Jonker (born 1944), Australian racing cyclist (born 1980), Dutch jazz singer Sjouke Jonker (1924–2007), Dutch journalist and politician, MEP 1979–84 Jonkers Jan Jonkers (born 1955), Dutch racing cyclist (1890–1971), Dutch jurist and university dean Marayke Jonkers (born 1981), Australian swimmer and paratriathlete Tim Jonkers (born 1980), Dutch-born Irish rugby player Adopted as a given name Jonker Afrikaner (c. 1785–1861), Namibian Orlam leader Jan Jonker Afrikaner (c. 1820–1861), Namibian Orlam leader, son of Jonker Jan Jonker Afrikaner High School, secondary school in Windhoek, Namibia

See also The Jonker, 726 carats diamond found by Johannes Jacobus Jonker in 1934 Jonker Sailplanes, South Africa glider manufacturer founded by Uys and Attie Jonker Jonker JS-1 Revelation, one of its gliders Jonker Walk and Jonker Street, Malacca street names dating from the Dutch colonial time (1641–1825) Théo De Joncker (1894–1964), Belgian composer Yonkers, New York, named after Jonker Adriaen van der Donck (1618–1655)

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