Rex strides onto the birth certificate wearing a laurel crown; derived straight from the Latin word for “king,” this brisk three-letter name has ruled languages from ancient Rome to modern playgrounds. He evokes images as varied as a marble-clad emperor giving orders in the Forum and the thunderous Tyrannosaurus rex stomping across museum dioramas—regal and larger than life, yet still playful enough for a wag-tailed family dog. In pop culture, silver-screen charmer Rex Harrison and the intrepid starfighter Rex from “Star Wars” keep the name humming with charisma, while the steady U.S. rankings—hovering comfortably in the 500s and 600s for decades—suggest a quiet confidence rather than a passing fad. Short, sharp, and impossible to miss, Rex offers parents a compact coronation for their son: a name that greets the world like a trumpet flourish and grows into a mantle of self-assurance.
| Rex Tillerson, former ExxonMobil CEO, served as U.S. secretary of state from 2017 to 2018. |
| Rex Harrison - Sir Reginald Carey Harrison was an English actor who won Tony Awards for his roles in "Anne of the Thousand Days" and "My Fair Lady." |
| Rex Trailer was best known as the host of the children's television show Boomtown from 1956 to 1974. |
| Rex Edwin Lee, the 37th solicitor general, argued 59 Supreme Court cases and elevated the office's role in U.S. legal policymaking. |
| Rex James Hunt is an Australian television and radio personality, former footballer and police sergeant, celebrated for his quirky player nicknames and worldwide fishing shows, who also owned a restaurant. |
| Rex Robert Brown is an American musician renowned as Pantera's longtime bassist and longest-serving member, who also showcased his vocals and guitar on his 2017 solo debut. |
| Sir Rex Masterman Hunt was a British diplomat and Governor of the Falkland Islands who was captured during the 1982 Argentine invasion. |
| Henry Greathead Rex Mason was a New Zealand politician who served as the longest-serving MP from 1926 to 1966, holding key ministerial positions and significantly influencing the Labour Party. |
| Rex Elvie Allen Sr., known as The Arizona Cowboy, was an American actor, singer, songwriter, and Disney narrator who received a star on the Hollywood Walk of Fame in 1975. |
| Rex Whistler was a British artist known for his murals, portraits, and theatrical costume designs, who died in World War II and was the brother of poet Laurence Whistler. |
| Alpha Rex Emmanuel Humbard was an American televangelist whose Cathedral of Tomorrow show reached over 600 stations at its peak. |
| Rex Theodore Barber Sr. was a U.S. WWII fighter pilot renowned for his part in the secret mission that intercepted and killed Japanese Admiral Isoroku Yamamoto. |
| Rex Roy Cramphorn was an Australian theatre director, playwright, and designer active in the 1970s and 1980s. |
| Rex Joseph Walheim is a retired Air Force officer and NASA astronaut who flew on three Space Shuttle missions, including the final one, STS-135. |