Phi is a distinctive boys' name in United States, ranking #8008 in 2004 with 9 recorded births. The name reached its all-time peak in 1996 with 18 births ranking #3788. Since 1996, the popularity has decreased by 50.0%. In 2004, approximately 1 in every 220,534 boys born was named Phi. RISING Recent data shows the name is currently rising.