Phi is a distinctive boys' name in United States, ranking #5801 in 2003 with 13 recorded births. This places Phi in the top 45% of ranked US boys' names for the year. Its actual usage is classified as Rare. The name reached its all-time peak in 1996 with 18 births ranking #3788. Since 1996, the popularity has decreased by 27.8%. In 2003, approximately 1 in every 151,944 boys born was named Phi. RISING Recent data shows the name is currently rising.