Claes Corneliszoon Moeyaert or Nicolaes Moyaert or Mooyaert (1592–1655) was an authoritative Catholic Dutch painter. He followed Rembrandt in his use of red chalk. Moeyart was born in Durgerdam. As a young man he is thought to have traveled to Italy to see and experience its art. At 25 he married Grietje Claes (in 1617). Possibly he was in business with Pieter Lastman in St. Antoniesbreestraat.