Langdon is a distinctive boys' name in United States, ranking #5799 in 1996 with 10 recorded births. This places Langdon in the bottom 45% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 2005 with 33 births ranking #3133. In 1996, approximately 1 in every 189,423 boys born was named Langdon. FALLING Recent data shows the name is currently falling.