Identifiers
| WikiData URI | http://www.wikidata.org/entity/Q4464908 |
| Biografisch Portaal | http://www.biografischportaal.nl/persoon/45978734 |
| RKDartists | https://rkd.nl/explore/artists/38972 |
| Amsterdam Museum | http://hdl.handle.net/11259/people.20930 |
| VIAF | http://viaf.org/viaf/96231051 |
| PPN | http://data.bibliotheken.nl/id/thes/p070196222 |
| Adamlink URI | https://adamlink.nl/person/hofker-willem-gerard/4755 |
