Identifiers
| WikiData URI | http://www.wikidata.org/entity/Q15962434 |
| Biografisch Portaal | http://www.biografischportaal.nl/persoon/45554161 |
| RKDartists | https://rkd.nl/explore/artists/45300 |
| Amsterdam Museum | http://hdl.handle.net/11259/people.29562 |
| VIAF | http://viaf.org/viaf/95885303 |
| Adamlink URI | https://adamlink.nl/person/koekkoek-hermanus-i/4398 |
