Jonkman is a Dutch surname meaning "young man" (modern Dutch jongeman) or "bachelor" (archaic Dutch jongman).Jonkman at the Database of Surnames in The Netherlands. People with the surname include:

Bartel J. Jonkman (1884–1955), American (Michigan) politician (born 1984), Dutch track racing cyclist Harmen Jonkman (born 1975), Dutch chess player Jan Anne Jonkman (1891–1976), Dutch politician, Minister of Colonial Affairs 1946–48 Janneke Jonkman (born 1978), Dutch writer Marjan Jonkman (born 1994), Dutch fashion model Mark Jonkman (born 1986), Dutch cricketer, twin brother of Maurits Maurits Jonkman (born 1986), Dutch cricketer, twin brother of Mark

References