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Smart Baby Names: Dictionary of Baby Names, Meanings and Origins.

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Baby Genders

Alphabetical List

Name Origins

Boy Name: Rex

Name: Rex
Pronunciation: \rex\
Gender / Sex: boy name boy
Meaning: king
Origin: Latin
Related Names: Rey
Sounds Like: Regis, Rochus
Variant forms: Reyes
Rank as First Name (Given Name): 333
Rank as Last Name (Surname, Family Name): 6158


Rex \rex\ as a boy's name is pronounced reks. It is of Latin origin, and the meaning of Rex is "king". Mostly 20th-century use. Actor Rex Harrison; film critic Rex Reed.

Rex has 1 variant form: Reyes.

For more information, see also the related name Rey.

Baby names that sound like Rex are Regis and Rochus.

View a list of the 2 names that reference Rex.


Rex is a very popular first name for men (#333 out of 1220) and also a very popular surname or last name for both men and women (#6158 out of 88799). (1990 U.S. Census)

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