Willem Abel Janszoon is the Dutch explorer's full name.
Willem Wilmink's birth name is Willem Andries Wilmink.
Willem Ward's birth name is Willem Luke Ward.
Willem Mengelberg's birth name is Mengelberg, Josef Willem.
Willem Elzenga's birth name is Willem Lodewijk Elzenga.
Willem Drieling's birth name is Willem Johannes Drieling.
Willem van Beusekom's birth name is Willem Jacobus Marius van Beusekom.
Willem Paul Edelman's birth name is Willem Paul Franciscus Xaverius Edelman.
Willem Ruis's birth name is Klaas Ruis.
The meaning of Willem is "determined protector".
Willem Dafoe's birth name is William J. Dafoe.
Willem Duyn's birth name is Wilhelmus Jacobus Duyn.
Willem Elsschot's birth name is Alphonsus Josephus de Ridder.