Garreth is a distinctive boys' name in United States, ranking #10001 in 2016 with 7 recorded births. The name reached its all-time peak in 1998 with 18 births ranking #3900. Since 1996, the popularity has decreased by 36.4%. In 2016, approximately 1 in every 271,030 boys born was named Garreth. FALLING Recent data shows the name is currently falling.