Valdemar is a distinctive boys' name in United States, ranking #14103 in 2012 with 5 recorded births. The name reached its all-time peak in 2002 with 24 births ranking #3664. Since 1996, the popularity has decreased by 61.5%. In 2012, approximately 1 in every 379,325 boys born was named Valdemar. STABLE Recent data shows the name is currently stable.