Willem Cornelisz Duyster (1599–1635) was a Dutch Golden Age painter from Amsterdam.
According to the RKD, his name was taken from his house on the Amsterdam Koningstraat, which was called "De Duystere Werelt", the dim world. He was a pupil of Pieter Codde. He married the sister of the painter Simon Kick (1603–1652), who himself married Willem's sister.[1]
Duyster's paintings generally depicted genre scenes and portraits, quite often of soldiers. He exhibited a strong ability to paint textiles, accurately characterize his subjects, and to depict relationships between his figures. Duyster's career was cut short when he succumbed to the plague in 1635.[2][1]