Valdemar is a distinctive boys' name in United States, ranking #7610 in 2005 with 10 recorded births. The name reached its all-time peak in 2002 with 24 births ranking #3664. Since 1996, the popularity has decreased by 23.1%. In 2005, approximately 1 in every 199,715 boys born was named Valdemar. STABLE Recent data shows the name is currently stable.