Phi is a distinctive boys' name in United States, ranking #9335 in 1998 with 6 recorded births. The name reached its all-time peak in 1996 with 18 births ranking #3788. Since 1996, the popularity has decreased by 66.7%. In 1998, approximately 1 in every 318,553 boys born was named Phi. RISING Recent data shows the name is currently rising.