Emerging from the Greek root κλέος (kleos, “glory”), Cleo began as a contracted form of Cleopatra yet has operated autonomously in the Anglo-American name pool since the late nineteenth century; today it is rendered in English as KLEE-oh, while the classical Greek articulation favors the slightly more open KLEH-oh. The appellation’s semantic core is reinforced by illustrious cultural referents—most notably Cleopatra VII, whose political acumen lent the element enduring prestige, and the Muse of History, Clio, whose near-homophonous title shares the same etymological wellspring—so that Cleo occupies a conceptual space where feminine authority and historical consciousness quietly converge. In the United States the name rose to moderate popularity in the 1910s, receded throughout the mid-twentieth century, and has exhibited a measured resurgence in the past decade, now stabilizing near the 500th position; this cyclical pattern aligns with broader contemporary preferences for concise, vintage-inflected choices. Consequently, Cleo presents prospective parents with a compact yet resonant designation: technically rooted in classical language, culturally linked to figures of narrative and power, and stylistically compatible with the streamlined modern lexicon of given names.
| Cleo Laine was an acclaimed English singer and actress renowned for her scat singing and honored with awards including a Grammy and damehood. |
| Cleo Albert O'Donnell was an American football player for Holy Cross and a celebrated coach, best known for his undefeated 1914 Everett High School team and inductions into multiple Halls of Fame. |
| Cleo Wade is an American artist, poet, activist, and author. |
| Cleo Una Moore was an American actress renowned for her blonde bombshell roles in 1950s Hollywood films and as a popular pin-up girl. |
| Cleo Joel Green III was an American murderer and burglar convicted in 1989 for killing Ina Mae York and other attacks in Louisville, Kentucky. |
| Cleo King is an American actress best known for her role in the TV series Mike & Molly from 2010 to 2016. |
| Cleo Demetriou - Cleopatra "Cleo" Demetriou is an Olivier Award-winning British child actress, best known for starring in Matilda the Musical in London's West End. |
| Cleo Simmons is an American former NFL tight end who played for the Dallas Cowboys and attended Jackson State University. |
| Cleo Walker is a former linebacker and center who played in the NFL and WFL. |
| Cleo Desmond was an American actress and vaudeville performer with a lengthy career in stage and screen. |