Valdemar is a distinctive boys' name in United States, ranking #3664 in 2002 with 24 recorded births. The name reached its all-time peak in 2002 with 24 births ranking #3664. Since 1996, the popularity has increased by 84.6%. In 2002, approximately 1 in every 80,895 boys born was named Valdemar. STABLE Recent data shows the name is currently stable.