List of Famous people named Willem

Jan Willem van Otterloo was a Dutch conductor, cellist and composer.

Wilhelmus Jacobus Duyn was a Dutch singer, actor, and entertainer. Under the stage name Big Mouth he was co-vocalist of the Dutch pop music duos Mouth & MacNeal (1971–1974) and Big Mouth & Little Eve (1975–1977).

Willem Drost was a Dutch Golden Age painter and printmaker of history paintings and portraits.

Willem Panneels was a Flemish engraver who was active in the first half of the 17th century. He is mainly known for the copies he made of drawings from the personal study of Rubens.

Willem Hendrik van den Bos was a Dutch astronomer who worked at the Union Observatory in South Africa and became its director in 1941. He discovered nearly 3000 new double stars, made more than 71000 astronomical measurements and compiled a catalogue of Southern hemisphere double stars. He computed the orbits of more than 100 double stars using a method he invented and which later became the accepted standard.