Golden ratio; also a Vietnamese name meaning 'to fly'
In a Western context, Phi refers to the 21st letter of the Greek alphabet and the mathematical 'Golden Ratio,' symbolizing perfect proportion. As a Vietnamese name, it is a common masculine name meaning to fly, soar, or move quickly. It is also used in various African cultures with distinct etymological roots.
Fewer than 5 boys were named Phi in 2025.
American actor known for 'Happy Death Day'
Famous Vietnamese-American singer
US births per 5-year period, 1990–present (SSA data).
