Guilherme vs Guillermina
American parents have registered 1,925 Guillerminas since 1880, against 522 Guilhermes. But in 2025 it was Guilherme that was commoner, 8 babies to fewer than five.
Babies given each name, 1880–2025
Guilherme 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 105 years in which either name was published, Guillermina for 80 years and Guilherme for 25 years. The lead changed hands 5 times.
- 1918–1920 Guillermina ahead
- 1921 Guilherme ahead
- 1923–1999 Guillermina ahead
- 2000–2022 Guilherme ahead
- 2024 Guillermina ahead
- 2025 Guilherme ahead
Side by side
| Guilherme | Guillermina | |
|---|---|---|
| Total US births | 522 | 1,925 |
| Most in one year | 39 | 40 |
| Babies in 2025 | 8 | under 5 |
| Estimated living today | 510 | 1,600 |
| Median age today | 18 | 49 |
| Peak year | 2006 | 1966 |
| Best rank | 2,881st boys | 1,796th girls |
| Rank in 2025 | 8,910th | unranked |
| First recorded | 1921 | 1918 |
| Girls / boys | 0 / 522 | 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 Guilhermes are over 18. That is 31 years between them: two names in use at the same time, worn by two different generations.
Where each one is strongest
- Guilherme Massachusetts (32.0×)
- Guillermina California (5.6×), Texas (5.4×)
How much commoner the name is in that state than it is nationally, from births recorded since 1910.
Both names abroad
Countries whose statistics office publishes both names, so the comparison can be made somewhere other than the United States.
| Country | Guilherme | Guillermina |
|---|---|---|
| France | 435 | 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: Guilherme and Guillermina.