Leo

The Latin name for a lion

Leo means “lion” in Latin. It is a complete name with a long history of its own, as well as a familiar short form of some longer names beginning with Leo. Its three letters connect an ancient animal word with royal, religious, literary, and astronomical traditions.

Early Christians used Leo, and it became the name of several popes. Leo the Great, a fifth-century pope, is one of its best-known early bearers. The name was also borne by Byzantine emperors and Armenian kings, giving it an international history well before its modern popularity in English-speaking countries.

A short name with several relatives

In English, Leo is normally LEE-oh, with two syllables and the stress at the beginning. German and several other European pronunciations use a first vowel closer to lay. The two vowel sounds make the name feel longer in speech than its three-letter spelling might suggest.

Leon is a close relative sharing the lion meaning. Leonard and Leonardo contain the lion element within longer names and can also be shortened to Leo. The name can therefore stand alone or serve as an everyday form within a larger family of names, depending on the person's full name.

Leo Tolstoy in English-language literature

Russian novelist Leo Tolstoy supplies a major literary association. His Russian first name is Lev, itself a lion name, while Leo is the form widely used on English-language editions of his books. War and Peace and Anna Karenina made that version of his name familiar to generations of readers.

Anna Karenina follows the consequences of Anna's relationship with the officer Vronsky, setting that story beside Levin's search for a satisfying and meaningful life. The novel moves between personal choices, family relationships, and the expectations of the society around its characters.

A lion in the night sky

Leo is also the name of a constellation. Its bright star Regulus sits near the group of stars outlining the lion's head and mane, often described as a backward question mark. Denebola marks the lion's tail.

This astronomical use carries the same lion image as the personal name. It gives Leo a visible connection with the night sky as well as its human history. The constellation's recognizable outline has made the lion one of the enduring animal figures used to describe patterns among the stars.

Popularity in the United States

Leo rose from number 91 for American boys in 2015 to number 36 in 2020. It reached its best rank, number 18, in 2023 and stood at number 19 in 2025, with 8,173 boys. Its largest annual count came in 2022, with 8,293 births. These recent figures show a strong modern rise for a name whose history reaches back to Latin antiquity.

How popular is Leo?

In 2025, Leo ranked #19 among boys in the United States, with 8,173 recorded uses. The U.S. birth records first list this spelling for boys in 1880; its largest annual count was 8,293 in 2022. Rankings count each spelling separately. They describe national use, so local familiarity can differ. The popularity chart shows whether the name has remained common, returned after a quieter period, or risen recently.