MallowbyNames

Reo

REE-oh · Meaning uncertain; possibly a short form of longer names or a modern coinage.

2025 rank (boys)
#6,803
Babies named in 2025
12
Peak popularity
1917
2025 frequency
1 in 142,340 boys
Usually for
Boys
Trend
Rising since 2003

A 1910s favorite, climbing again.

Popularity of Reo since 1912

Babies named Reo per year in U.S. Social Security records.

61218192019602000Most births 1917Boys
Data table (by decade)
DecadeBoys
1910s91
1920s119
1930s39
1940s63
1950s49
1960s23
1970s29
1980s78
1990s95
2000s70
2010s97
2020s82

Meaning & origin

Reo is a rare modern name that first appeared in U.S. records in 1912. It peaked in popularity in 1917 but then faded almost entirely before beginning a gradual rise again since 2003. In 2025, it ranked 6803, with about 1 in every 142,340 boys receiving the name. Its origins are unclear, but it functions as a short, sleek choice often associated with the similar name Rio. While never widely used, its recent upward trajectory suggests a niche appeal among parents seeking uncommon, one-syllable names.

Reo is primarily a modern English coinage, likely a short form of names such as Mateo or Romeo, or a respelling of Rio. Its usage as a given name is rare but has seen a gradual increase since the early 2000s.

Nicknames & variants

Variants: Rio

Sibling names for Reo

Names that share Reo's style, for a brother or sister.

Sisters: Lea, Nia, Thea, Mila, Kai

Brothers: Leo, Noa, Theo, Kai, Eli

A parent animal hugging its little one, the personalized name page

R is for Reo, our favorite little boy.

R is for Reo…”

In a Mallowby alphabet book, Reo's letter becomes Reo's page: hand-illustrated, printed hardcover or paperback, made just for them.

Make Reo's book

Books for siblings or grandkids? The second book is 15% off.

Questions parents ask

What does the name Reo mean?
The meaning of Reo is uncertain. It is likely a short form or a modern coinage.
How popular is the name Reo?
Reo is extremely rare. In 2025, it ranked 6803 with approximately 1 in 142,340 boys given the name.
Is Reo a boy's name or a girl's name?
Reo is predominantly used as a boy's name, though its rarity means it could be used for any gender.