Valdemar is a distinctive boys' name in United States, ranking #4878 in 2001 with 16 recorded births. The name reached its all-time peak in 2002 with 24 births ranking #3664. Since 1996, the popularity has increased by 23.1%. In 2001, approximately 1 in every 121,427 boys born was named Valdemar. STABLE Recent data shows the name is currently stable.