Phi is a distinctive boys' name in United States, ranking #7576 in 2008 with 11 recorded births. The name reached its all-time peak in 1996 with 18 births ranking #3788. Since 1996, the popularity has decreased by 38.9%. In 2008, approximately 1 in every 185,450 boys born was named Phi. RISING Recent data shows the name is currently rising.