Valdemar is a distinctive boys' name in United States, ranking #13984 in 2019 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 2019, approximately 1 in every 358,672 boys born was named Valdemar. STABLE Recent data shows the name is currently stable.