Named for the Dutch composer and organist Jan Pieterszoon Sweelinck (1562–1621). At the age of 18, Sweelinck succeeded his father as organist of the Old Church of Amsterdam, a position he held to his death. He composed many choral songs, motets and madrigals. His fantasias and variations influenced North German organ music. Praetorius {see planet  (4889)} was one of his pupils. (M 30802) _ _.