Globally, Duijnhouwer (Duijnhouwer 
) is an extremely rare unknown gender first name. Much more frequently, Duijnhouwer is the last name as well as the forename.
| VARIANT | COUNTRY |
|---|---|
| Duijnhouwer | Brazil, Netherlands |
| toon duijnhouwer Dutch association football player (1912-1990), NL (b. 1912) |
|