He was possibly a relation of David Decker, who was registered in the Haarlem guild as a pupil of Gerrit Claesz Bleker in Haarlem in 1640. David Decker's only known artwork was formerly attributed to Cornelis and shows strong similarity with his work.
- 12 paintings by or after Cornelis Gerritsz Decker at the Art UK site
- Cornelis Gerritsz Decker on Artnet
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