Phi is a distinctive boys' name in United States, ranking #5982 in 2002 with 12 recorded births. The name reached its all-time peak in 1996 with 18 births ranking #3788. Since 1996, the popularity has decreased by 33.3%. In 2002, approximately 1 in every 161,789 boys born was named Phi. RISING Recent data shows the name is currently rising.