Glendon is a distinctive boys' name in United States, ranking #4897 in 2003 with 16 recorded births. The name reached its all-time peak in 2015 with 26 births ranking #4016. Since 1996, the popularity has decreased by 23.8%. In 2003, approximately 1 in every 123,454 boys born was named Glendon. STABLE Recent data shows the name is currently stable.