35,310births recorded
7Countries
3Variants
2004Peak · Québec
#125Belgium 2025
Marylou is a girl name family recorded 35,310 times in 7 countries since 1898. It ranks highest today in Belgium (#125 in 2025). Its all-time peak was in Québec in 2004, at 298.4 births per 100,000. Elsewhere it is mostly given as Marilou (France, Québec, Belgium), Mary-Lou (England & Wales).
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 Marylou
| Variants | Language | Total births | Country | Latest rank | Peak year | 10-year trend |
|---|---|---|---|---|---|---|
| Marylou | English | 13,112 | 🇺🇸 United States | #4758 | 1937 | ▲ 24 % |
| Marylou | English | 5,470 | 🇫🇷 France | #793 | 2006 | ▼ 62 % |
| Marylou | English | 1,056 | 🇨🇦 Québec | – | 2003 | – |
| Marylou | English | 225 | 🇨🇦 Ontario | – | 1950 | – |
| Marylou | English | 185 | 🇧🇪 Belgium | #1148 | 2012 | ▼ 50 % |
| Marylou | English | 40 | 🇨🇭 Switzerland | – | 2005 | – |
| Marilou | French | 6,070 | 🇫🇷 France | #644 | 2006 | ▼ 53 % |
| Marilou | French | 4,150 | 🇨🇦 Québec | #185 | 2004 | ▼ 51 % |
| Marilou | French | 3,231 | 🇺🇸 United States | – | 1933 | – |
| Marilou | French | 1,114 | 🇧🇪 Belgium | #125 | 2020 | ▲ 44 % |
| Marilou | French | 124 | 🇨🇭 Switzerland | #788 | 2010 | ▲ 11 % |
| Marilou | French | 16 | 🇨🇦 Ontario | – | 1956 | – |
| Mary-Lou | English | 310 | 🇫🇷 France | #6739 | 2006 | ▲ 27 % |
| Mary-Lou | English | 159 | 🇨🇦 Ontario | – | 1942 | – |
| Mary-Lou | English | 23 | 🏴 England & Wales | – | 2023 | – |
| Mary-Lou | English | 19 | 🇨🇦 Québec | – | 2002 | – |
| Mary-Lou | English | 6 | 🇧🇪 Belgium | – | 2015 | – |
How we grouped these names
- Marylou ↔ Marilou — spelling variant
- Marylou ↔ Mary-Lou — spelling variant
Questions about Marylou
How popular is the name Marylou?
In 2025 it ranked #125 in Belgium. Official registers record 35,310 births across 7 countries.
What is Marylou in other languages?
Marilou (French); Mary-Lou (English).
When was Marylou most popular?
It peaked in Québec in 2004, at 298.4 births per 100,000.
Is Marylou a boy or a girl name?
In official birth registers, Marylou is a girl name.