Glendon is a distinctive boys' name in United States, ranking #4966 in 2001 with 15 recorded births. The name reached its all-time peak in 2015 with 26 births ranking #4016. Since 1996, the popularity has decreased by 28.6%. In 2001, approximately 1 in every 129,522 boys born was named Glendon. STABLE Recent data shows the name is currently stable.