Rex

“King” — Latin origin

Boy's name · #859 in the US (2025) · Timeless

Few names move less than Rex — on the books since 1880, #859 in 2025, and dependable in between. Roughly 60,000 boys share it. In all that time it has never once missed a year of the national records.

Around the world: about 1 in 1,300 boys in England & Wales (2025) · about 1 in 1,400 boys in New Zealand (2025) · about 1 in 4,900 boys in Scotland (2025).

Appears in 2020-2025 birth records of 35 states. See the full state-by-state map on this page.

Famous Rexes

Rex Tillerson — 69th United States Secretary of State
Rex Harrison — British actor (1908–1990)
Rex Stout — American writer (1886-1975)
Rex Linn — American actor
Rex J. Walheim — American astronaut

In stories & tradition

Rex (Metamorpho) — The Brave and the Bold
Captain Rex — Star Wars: The Clone Wars · Dark Disciple
Rex Van de Kamp — Desperate Housewives

What Rexes become

Among 496 notable people named Rex:

Sports figures appear 1.65× more often than among typical names — e.g. Rex Hartwig, Australian tennis player (1929–2022).

Similar names: Rexton · Frankie · Reggie · Terrence · Lex · Richie

Browse more boy names — popularity, trends and eras for 5,700+ American names, free.

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