Emily P. Contributor

Rex, Latin for 'king', is a dog name that's been ruling the roost for years. It's a classic, like the T-Rex, a name that roars strength and power. It's also a nod to pop culture, with Rex from Toy Story being a lovable, if not the most ferocious, character. Plus, it's short and snappy, perfect for training commands. So, if you want your pooch to have a regal, commanding presence (even if he's more likely to chase his tail than rule a kingdom), Rex is a top-dog choice. All hail King Rex, the first of his name, ruler of the backyard!

Traits associated with the name Rex:

Dogs named Rex tend to be loving, loyal, good-natured, and brave. This name is also associated with companionship, and beauty.

What does it say about you to have a dog named Rex?

Naming your dog Rex suggests that you are a person who values strength, loyalty, and courage. It also suggests that you are a person who is willing to take on a challenge and is not afraid to take risks.

Is Rex a good dog name?

Rex is a one-syllable dog name, making it short and snappy. Rex is a widely loved dog name for good reason. If you like it, go for it!

Popularity: Overall

PupNames logo
New York City Dog Name Database
Los Angeles Times 'Top Dogs'

Rex is one of the more popular dog names out there. According to our data, Rex outranks the great majority of names.

Popularity: Historical Trend

Rex was, in the past month, the 635th most viewed dog name on

As of July 2024, Rex is becoming ever more niche with new puppy owners. Our stats suggest that the name is less fashionable than it was at this time last year.

We've seen quite a lot of variation in rank for this name, which may suggest seasonal factors or interest driven by pop culture events.

In the past week, Rex was viewed 0 times, and liked 6 times.

Popularity: United States

The map below shows Rex's popularity across the United States, according to PupNames data.

Rex is most adored in Nebraska, Tennessee and Wisconsin.

By contrast, the name has been shown the least amount of interest in Utah, Louisiana and New Mexico.

Popularity: Around The World

And this world map shows which countries have the greatest love for the name Rex.

Most popular breeds named Rex:

  1. German Shepherd
  2. Labrador Retriever
  3. Rottweiler
  4. Chihuahua
  5. American Pitbull Terrier

Famous dogs named Rex:

  • comics icon A german shepherd named Rex appeared in the comic book Rex The Wonder Dog by Robert Kanigher and Alex Toth.
  • film icon A golden retriever named Rex played a role in the movie Cybermutt.
  • television icon A german shepherd dog named Rex featured in the television show Inspector Rex.

Rex is found in these categories:

cool dog names

Latin roots imply "king", enhancing its regal, commanding appeal.

old fashioned dog names

Latin for "king," it harks back to ancient Roman times.

funny dog names

Ironically, this moniker mocks a canine's regal, dinosaur-like stature.

traditional dog names

Latin for "king", it's been popular in canine nomenclature for centuries.

exotic dog names

Latin roots and Jurassic Park fame lend it a unique, foreign flair.

guard dog names

Latin roots translate to "king", implying authority and protection.

movie dog names

He's named after a T-Rex, the star of Jurassic Park!

big dog names

Rex means king, perfect for a pooch with a grand presence!

Dog names like Rex:

Wolf Counsel
a city in western Nevada at the foot of the Sierra Nevada Mountains; known for gambling casinos and easy divorce and remarriage
an adult member of the Boy Scouts movement
Brawny and tough.
Rex dog name meaning

Comments icon Comments (2)

Commenter icon
Mel (Tennessee, United States)
We named our recently adopted male American Staffordshire Terrier/Boxer mix Rex. The attributes of the name perfectly describe him. We are so lucky to have found such a sweet, loving, intelligent boy.
January 15, 2024

Commenter icon
Sylvia (Florida, United States)
I love the name it’s so nice
December 22, 2022

Let us know what you think of Rex as a dog name!