Claessoon, Arnold (called by Dutch writers Aart Klaaszoon, or Aartgens van Leyden), a Dutch historical painter, was born at Leyden in 1498, studied under Engelbrechsten, and died in 1564. There are two pictures by him, much praised, at Leyden, representing The Crucifixion, and Christ Bearing his Cross. See Spooner, Biog. Hist. of the Fine Arts, s.v.; Rose, Gen. Biog. Dict. s.v.