Leo means “lion” and comes from Latin. Families who explore baby name meanings often appreciate its clear sound and bold symbolism. In European languages, it is usually a masculine given name with ancient roots. Its brief two-syllable rhythm gives it a fresh, friendly energy that appeals to parents looking for a simple yet distinguished choice.
Choosing a baby name often involves balancing historical depth with everyday wearability. Leo achieves that balance easily, offering an energetic feel that works across cultures and generations. Because it feels both grounded and spirited, it continues to attract families wanting a name that is straightforward to say and spell.
Meaning and Origin
The name Leo originates from the Latin word leo, meaning “lion.” This Latin term developed as a calque of the Ancient Greek word leon (λέων), which also translates to “lion.” Going back further into antiquity, the Greek term calqued the Akkadian words neshu (𐠪) and urgulu (𒁻). Those Akkadian roots stemmed directly from the Sumerian word UR.GU.LA (𒁻), which carried the meanings of “lion” and “name of constellation.” The name is also connected with the zodiac constellation symbol ♌︎.
In European languages, Leo is usually a masculine given name. It also has a long history of use as a short form for longer traditional names that begin with Leo-, including Leonard, Leonardo, Leonidas, Leopold, and occasionally Llywellyn. Across the centuries, the name was borne by numerous saints and 14 popes. In May 2025, Robert Prevost took the name Leo XIV after being elected as the first American pope.
Pronunciation
The standard pronunciation of Leo is LEE-oh. The first syllable rhymes with see, tree, and free. The second syllable rhymes with go, no, and so. Stress falls on the first syllable, producing a bright, melodic sound that is easy for young children to pronounce and understand.
Popularity in the US
The name first appears in the SSA data in 1880, and it has most often been given to boys. In 1950, it held rank 160 with 1,554 babies, before moving to rank 367 with 473 babies in 1980 and rank 388 with 658 babies in 2000. Use of the name picked up by 2010 when it reached rank 191 with 1,946 babies, followed by a rise to rank 36 with 7,229 babies in 2020. It reached its peak rank of number 18 in 2023. By 2025, the name stood at rank 19 with 8,173 babies, bringing the total count to 259,988 US boys given the name since 1880.
| Year | US rank (boys) | Babies named Leo |
|---|---|---|
| 1950 | #160 | 1,554 |
| 1980 | #367 | 473 |
| 2000 | #388 | 658 |
| 2010 | #191 | 1,946 |
| 2020 | #36 | 7,229 |
| 2025 | #19 | 8,173 |
Source: US Social Security Administration baby name data (names given to at least 5 babies in a year).
Nicknames
Because Leo is already a compact three-letter name, most parents choose to use it in full without shortening it further. Common short forms of the name itself include Lee and Lio. For parents interested in other-language forms, European naming traditions include related cognates and doublets such as Leon, leu, lev, and Lyon.
Famous People Named Leo
Leo Tolstoy was a renowned Russian author who wrote the classic novels War and Peace and Anna Karenina.
Leo Durocher was an American professional baseball player and manager who won three World Series titles and earned induction into the Baseball Hall of Fame.
Pope Leo XIV is the papal name adopted by Robert Prevost upon his election as the first American pope in May 2025.
Middle and Sibling Names
Middle names that pair well with Leo include Alexander, Benjamin, David, James, Joseph, Samuel, William, and Jacob.
Sibling names that complement it include Clara, Felix, Grace, Jasper, Maya, Nora, Oliver, Silas, and Ezra.
FAQ
Which ancient root words formed the name Leo?
The name developed directly from the Latin word leo and the Ancient Greek word leon, which both mean lion. These forms calqued the earlier Akkadian words neshu and urgulu, which traced back to the ancient Sumerian term UR.GU.LA, representing a lion as well as the name of a constellation.
How does Leo’s peak rank compare to its most recent position?
Leo reached its peak rank at number 18 in 2023, which is just one spot above its latest standing of number 19 in 2025. In that latest year, 8,173 boys received the name, demonstrating that its popularity remains near its historical high point.
How many boys in the United States have received the name Leo?
A total of 259,988 US boys have been given the name Leo since 1880. That count represents the complete tally across all reported years up through 2025, during which the name was given most often to boys.
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