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What does Rex mean?

Rex [rex] as a boys' 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.

Associated with: king, 20th century (modern), reed (meadow).


Rex has 1 variant: Reyes.

Affiliated boy name: Rey.

Rex has 2 feminine forms: Rexanne and Rey.

Kreatif forms:
(male) Redi, Rorex, ..

(female) Rean, Rexcio, ..

How popular is Rex?

Rex is a very popular first name for men (#333 out of 1220, Top 27%) and also a very popular last name for both adults and children (#5824 out of 150436, Top 4%). (2000 U.S. Census)


Ranking and usage % can show different trends depending on the distribution of names that year.

Displayed below is the birth name popularity of Rex for boys. Rex reached its peak rank of #198 in the U.S. during 1950-1959, and is currently at #663. (2014 Birth Statistics)

Top 2000 baby names ranking of Rex name in U.S.

Top 100 baby names ranking of Rex outside U.S.

Displayed below is a comparison of the popularity of Rex and affiliated names. Rey (#884 via latest list) and Reyes are the popular related forms of Rex (#663 via latest list) ranked in the Top 2000. These forms of Rex were favored 64 years ago (average #884) and are now much less common (#1182, 53%), with the version Rex becoming less trendy. Rex is the firm favorite, though Rey has become trendy as well over time.

Top 2000 baby names ranking of Rex, Rey, Reyes in U.S.

Top 100 baby names ranking of Rex and related baby names outside U.S.

Similar Names


Suggested similar names are Dex, Lex, Reg, Rei, Ren, Reo and Tex. These names tend to be less frequently used than Rex.