Seamus is a distinctive boys' name in United States, ranking #833 in 2006 with 244 recorded births. The name reached its all-time peak in 2008 with 298 births ranking #753. Since 1996, the popularity has increased by 55.4%. In 2006, approximately 1 in every 8,423 boys born was named Seamus. RISING Recent data shows the name is currently rising.