Guillaume vs Guillermina
American parents have registered 1,925 Guillerminas since 1880, against 342 Guillaumes. Neither name reached five babies in 2025.
Babies given each name, 1880–2025
Guillaume Guillermina
Each line is every baby given the name that year, girls and boys added together — the only count that means the same thing for both names. A line breaks where the name fell below five babies in a year — the point at which the SSA stops publishing it — rather than being drawn through a figure nobody published. A single published year in a gap shows as a dot.
Who was ahead
Of the 100 years in which either name was published, Guillermina for 95 years and Guillaume for 5 years. The lead changed hands 8 times.
- 1918–1996 Guillermina ahead
- 1997 Guillaume ahead
- 1998–2008 Guillermina ahead
- 2010 Guillaume ahead
- 2011 Guillermina ahead
- 2012–2013 Guillaume ahead
- 2014–2015 Guillermina ahead
- 2016 Guillaume ahead
- 2018–2024 Guillermina ahead
Side by side
| Guillaume | Guillermina | |
|---|---|---|
| Total US births | 342 | 1,925 |
| Most in one year | 19 | 40 |
| Babies in 2025 | under 5 | under 5 |
| Estimated living today | 330 | 1,600 |
| Median age today | 29 | 49 |
| Peak year | 1997 | 1966 |
| Best rank | 3,601st boys | 1,796th girls |
| Rank in 2025 | unranked | unranked |
| First recorded | 1967 | 1918 |
| Girls / boys | 0 / 342 | 1,925 / 0 |
A rank is a position within one sex’s list for one year, so the two rank rows are not subtracted from one another and the winning column is not marked on them. The living figure is a life-table estimate, not a count.
Which name is older
Half of the Guillerminas alive today are over 49; half the Guillaumes are over 29. That is 20 years between them: two names in use at the same time, worn by two different generations.
Both names abroad
Countries whose statistics office publishes both names, so the comparison can be made somewhere other than the United States.
| Country | Guillaume | Guillermina |
|---|---|---|
| France | 222,980 | 5 |
Every spelling a country files separately is added together, over whatever years that country publishes — which is not the same range in any two of them, so read the columns against each other and not the rows.
Compare something else
Related comparisons
Social Security Administration birth records, 1880–2025, public domain. Full histories: Guillaume and Guillermina.