Seamus is a distinctive boys' name in United States, ranking #804 in 1999 with 191 recorded births. The name reached its all-time peak in 2008 with 298 births ranking #753. Since 1996, the popularity has increased by 21.7%. In 1999, approximately 1 in every 10,053 boys born was named Seamus. RISING Recent data shows the name is currently rising.