Willem is a distinctive boys' name in England & Wales, ranking #1109 in 2010 with 24 recorded births. The name reached its all-time peak in 2008 with 34 births ranking #818. Since 1996, the popularity has increased by 100.0%. In 2010, approximately 1 in every 14,427 boys born was named Willem. FALLING Recent data shows the name is currently falling.