Rex

Boy name

Rex has been given to 60,590 babies in the U.S. since 1880. It peaked in 1952 and currently ranks #859 for boys (2025).

Meaning & origin /ɹɛks/

From Latin rēx (“king”). Doublet of rajah and roy.

Origin: Latin

Etymology adapted from Wiktionary, licensed CC BY-SA 4.0.

Popularity over time births per year, 1880–2025

Hover or tap the chart to read any year.

Total babies

60,590

Peak year

1952 (1,505 babies)

Rank in 2025

#859 for boys

First recorded

1880

10-year trend

▼ -25%

Gender split

0% girls / 100% boys

Famous people named Rex

Rex Tillerson

69th United States Secretary of State

Rex Stout

American writer (1886-1975)

Rex Linn

American actor

Rex J. Walheim

American astronaut

Notability data from Wikidata (CC0).

Names with a similar vibe

Same primary gender, peaked around the same years, and roughly as common as Rex.

Gerardboy

58,932 babies since 1886

Rickeyboy

62,391 babies since 1924

Iraboy

62,535 babies since 1880

Fredrickboy

64,782 babies since 1880

Darylboy

67,477 babies since 1912

Donnieboy

68,060 babies since 1880

Tommieunisex

52,215 babies since 1880

Randolphboy

49,536 babies since 1880

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