MallowbyNames

Rui

ROO-ee · A common Portuguese name meaning 'red' or 'famous,' though debated.

2025 rank (boys)
#2,641
Babies named in 2025
49
Peak popularity
2024
2025 frequency
1 in 34,859 boys
Usually for
Boys
Trend
Rising since 1994

Rising since 1994, #2,641 for boys today.

Popularity of Rui since 1967

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

214162198020002020Most births 2024GirlsBoys
GirlsBoys
Data table (by decade)
DecadeGirlsBoys
1960s05
1970s0146
1980s0105
1990s068
2000s10123
2010s21176
2020s54264

Meaning & origin

Rui is a Portuguese name with roots in the Germanic Hrodric, meaning 'famous ruler,' though some link it to Latin rufus for 'red.' First recorded in U.S. data in 1967, it has been rising in popularity since 1994 and reached its peak in 2024 with a rank of 2,641 in 2025. The name is most common in California and is primarily used as a masculine given name, while it also appears in Portuguese-speaking communities worldwide.

Rui is a Portuguese given name, derived from the Germanic name Hrodric, composed of the elements hrod ('fame') and ric ('ruler'), thus meaning 'famous ruler.' It is also sometimes linked to the Latin rufus ('red,' 'red-haired'). The name has been used in Portugal since medieval times and is also common in Brazil and Lusophone Africa.

Where Rui is most popular

Births per 100,000 boys by state, 2025. The lightest shade means too few recorded births.

Rui” around the world

Where Rui lands in the latest official birth statistics abroad, matched to the U.S. spelling.

  • France

    5

    babies in 2024

Sources: INSEE (France).

Sibling names for Rui

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

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

R is for Rui, our favorite little boy.

R is for Rui…”

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

Make Rui's book

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

Questions parents ask

What does the name Rui mean?
Rui is a Portuguese name with debated meanings: it may mean 'famous ruler' from Germanic roots, or 'red' from Latin rufus.
How popular is Rui today?
As of 2025, Rui ranked 2,641 in U.S. popularity, with about 1 in every 34,859 newborns given the name.
Is Rui a boy or girl name?
Rui is almost exclusively used as a masculine name in Portuguese-speaking countries.