Jacob Gerritszoon[a] Loef (1605/1607 – 1683/1685), was a Dutch Golden Age marine painter.
[1] 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.
[2] He signed his works with the monogram IGL.
Loef at the Art UK site