Rex

Rex: name meaning, origin & popularity

Meaning: “king”
Origin: Latin
Say it: REKS · 1 syllable
Used for: Boys

From Latin rex meaning 'king.' It has long been used in the English-speaking world as a given name.

English names Names meaning royalty Classic names Short names

How popular is Rex?

202495.0 per million US babies

Drag the line or the slider to read any year. Values are per million US births recorded by Social Security. Records before about 1937 undercount births, so early peaks can look taller than they were.

Compare with another name

Babies named Rex in 2024316

2024 rank#792 boys

Peak year1951

Total US babies since 188060,301

Rex has been fairly stable over the last fifteen years.

Names like Rex

Variants, related forms and names with the same roots.

Lucasfrom Lucania · Latin
Leolion · Latin
Julianyouthful, downy-bearded · Latin
Anthonyof the Antonius family · Latin
RomanRoman, from Rome · Latin
Bennettblessed · Latin
Adrianfrom Hadria · Latin
Christianfollower of Christ · Latin

Rex questions

What does the name Rex mean?

Rex means "king". It comes from Latin. From Latin rex meaning 'king.' It has long been used in the English-speaking world as a given name.

Is Rex a boy or girl name?

Rex is mainly a boy's name in US records (100% of uses since 1880).

How popular is Rex?

316 US babies were named Rex in 2024. Its peak year was 1951.

How do you pronounce Rex?

Rex is usually pronounced REKS.

Birth counts: US Social Security Administration national data, 1880–2024 (names given to 5+ babies of a sex in a year). How we write meanings.