Valdemar is a distinctive boys' name in United States, ranking #12074 in 2016 with 6 recorded births. The name reached its all-time peak in 2002 with 24 births ranking #3664. Since 1996, the popularity has decreased by 53.8%. In 2016, approximately 1 in every 316,202 boys born was named Valdemar. STABLE Recent data shows the name is currently stable.