Seamus is a moderately popular boys' name in England & Wales, ranking #499 in 1999 with 40 recorded births. This places Seamus in the top 13% of ranked UK boys' names for the year. Its actual usage is classified as Moderately Popular. The name reached its all-time peak in 2007 with 45 births ranking #638. Since 1996, the popularity has increased by 33.3%. In 1999, approximately 1 in every 7,581 boys born was named Seamus. FALLING Recent data shows the name is currently falling.