Valdemar is a distinctive boys' name in United States, ranking #5287 in 2006 with 17 recorded births. The name reached its all-time peak in 2002 with 24 births ranking #3664. Since 1996, the popularity has increased by 30.8%. In 2006, approximately 1 in every 120,889 boys born was named Valdemar. STABLE Recent data shows the name is currently stable.