The contemporary biographer
Arnold Houbraken mixed up the various members of the Ruisdael family and assumed that all of their landscapes were the works of two brothers Jacob and Salomon, when in fact there were four painters; the brothers Isaack and Salomon, and their two sons who were confusingly both named Jacob and lived during the same period. According to the
Netherlands Institute for Art History (Dutch abbreviation, RKD), this Jacob was the son of Salomon van Ruysdael, who was a follower of his father and his more famous cousin, the other Jacob who was the son of
Isaack van Ruisdael. Since his works are stylistically similar, his works are sometimes confused with those of his father and cousin. ==References==