Seamus is a distinctive boys' name in United States, ranking #776 in 2005 with 254 recorded births. The name reached its all-time peak in 2008 with 298 births ranking #753. Since 1996, the popularity has increased by 61.8%. In 2005, approximately 1 in every 7,863 boys born was named Seamus. RISING Recent data shows the name is currently rising.