Phi is a distinctive boys' name in United States, ranking #7898 in 2015 with 10 recorded births. The name reached its all-time peak in 1996 with 18 births ranking #3788. Since 1996, the popularity has decreased by 44.4%. In 2015, approximately 1 in every 191,626 boys born was named Phi. RISING Recent data shows the name is currently rising.