Roo
Primarily a girl's name of Old English origin with 26 recorded births. Also given to 5 boys.
Meaning & Origin
Roo reads as a modern invention — a name that emerged in the 2020s and was likely coined by parents looking for something fresh rather than inherited.
The open, approachable quality of its ending — ending on a vowel softens the overall impression — keeps the name compact and easy to pair with longer middle names or surnames.
In the most recent SSA release, Roo ranks #14880 among U.S. girl names — distinctive enough to stand out.
Roo is a baby name of Old English origin, possibly a variant of Rue (from the English word rue, the medicinal herb) or an affectionate diminutive of names like Rowan or Ruby. Most famously, Roo is the small kangaroo in A.A. Milne's Winnie-the-Pooh — forever young, forever bouncing with joy.
Whimsical and warm, Roo is a name for a child who arrives with the pure energy of something small, new, and completely in love with the world.
EtymologyShow more
Roo appeared in SSA records in 2020, placing it in the modern era of American naming — a period when parents increasingly draw from global cultures, invent new names, and blend sounds to create something entirely original. Its Old English roots may have been the starting point, adapted or respelled to fit contemporary American tastes.
With only 26 recorded births, Roo has not been widely studied in naming literature — its story belongs primarily to the families who chose it.
At a Glance
Popularity Over Time
Roo has 4+ years of history in the U.S., first appearing in 2020.
Popularity by Decade
| Decade | Births | Avg Rank | Trend |
|---|---|---|---|
| 2020s | 26 | #14282 | — |
The Story of Roo
A Gen Alpha name
Peaking in 2022, Roo is a fresh, modern favorite. Girls named Roo are most likely born between 2020 and 2024.
How rare is Roo?
Only about 1 in every 600,000 babies born in 2024 was named Roo — a truly uncommon choice.
The journey through the decades
First appeared in the records in 2020, peaked in the 2020s with 26 births that decade.
Year-by-Year Data
View complete yearly data(4 years, 2020–2024)
| Year | Births | Rank |
|---|---|---|
| 2024 | 6 | #14880 |
| 2023 | 7 | #13189 |
| 2022 | 8 | #12028 |
| 2020 | 5 | #17031 |
Source: U.S. Social Security Administration. Showing years with 5+ recorded births.
Roo as a Boy's Name
Though more common for girls, Roo has a notable history as a boy's name too, with 5 births since 2024.
Frequently Asked Questions
Is Roo a boy's or girl's name?
When was Roo most popular?
How popular is the name Roo?
Can Roo be used for both boys and girls?
Explore More
Data source: U.S. Social Security Administration, 2020–2024