Seamus is a distinctive boys' name in England & Wales, ranking #518 in 2001 with 38 recorded births. The name reached its all-time peak in 2007 with 45 births ranking #638. Since 1996, the popularity has increased by 26.7%. In 2001, approximately 1 in every 7,574 boys born was named Seamus. FALLING Recent data shows the name is currently falling.