Gareth is a moderately popular boys' name in England & Wales, ranking #237 in 2002 with 125 recorded births. The name reached its all-time peak in 1996 with 373 births ranking #117. Since 1996, the popularity has decreased by 66.5%. In 2002, approximately 1 in every 2,306 boys born was named Gareth. FALLING Recent data shows the name is currently falling.