Jacob Gerritszoon Loef (1605/1607 – 1683/1685), was a Dutch Golden Age marine painter.Jacob Gerritsz. Loef at the University of Amsterdam's Ecartico website
He was born and died in Enkhuizen and worked there and in nearby Hoorn. According to the RKD he is known for his marines and Gerrit Pompe was his pupil.Jacob Gerritz. Loef in the RKD He signed his works with the monogram IGL.
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References
Jacob Gerritsz. Loef on Artnet