104,112births recorded
14Countries
3Variants
2025Peak · France
#2Québec 2025
Lou is a girl name family recorded 104,112 times in 14 countries since 1880. It ranks highest today in Québec (#2 in 2025). Its all-time peak was in France in 2025, at 346.1 births per 100,000. Elsewhere it is mostly given as Lo (Sweden).
Popularity by country
Births per 100,000 newborns, all forms of the name combined.
Which form wins where
Births per 100,000 newborns for each form, in the selected country.
All forms of Lou
| Variants | Language | Total births | Country | Latest rank | Peak year | 10-year trend |
|---|---|---|---|---|---|---|
| Lou | French | 55,060 | 🇫🇷 France | #12 | 2025 | ▲ 43 % |
| Lou | French | 34,109 | 🇺🇸 United States | #2645 | 1883 | ▲ 151 % |
| Lou | French | 3,491 | 🇧🇪 Belgium | #32 | 2023 | ▲ 31 % |
| Lou | French | 1,920 | 🇨🇦 Québec | #2 | 2025 | ▲ 227 % |
| Lou | French | 1,847 | 🇨🇭 Switzerland | #67 | 2022 | ▲ 16 % |
| Lou | French | 629 | 🇸🇪 Sweden | #176 | 2020 | ▲ 64 % |
| Lu | French | 4,081 | 🇺🇸 United States | #11932 | 1954 | new |
| Lu | French | 15 | 🇫🇷 France | – | 1992 | – |
| Lu | French | 9 | 🇦🇷 Argentina | – | 1987 | – |
| Lo | English | 2,260 | 🇸🇪 Sweden | #85 | 2020 | ▲ 15 % |
| Lo | English | 53 | 🇺🇸 United States | – | 1935 | – |
How we grouped these names
- Lou ↔ Lu — Wikidata “said to be the same as”
- Lou ↔ Lo — Wikidata “said to be the same as”
Questions about Lou
How popular is the name Lou?
In 2025 it ranked #2 in Québec. Official registers record 104,112 births across 14 countries.
What is Lou in other languages?
Lu (French); Lo (English).
When was Lou most popular?
It peaked in France in 2025, at 346.1 births per 100,000.
Is Lou a boy or a girl name?
In official birth registers, Lou is a girl name.