Rudolfo vs Rudolph
American parents have registered 53,638 Rudolphs since 1880, against 2,263 Rudolfos. Rudolph is still ahead, with 25 babies in 2025.
Babies given each name, 1880–2025
Rudolfo Rudolph
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
Rudolph has been the commoner name in every year either was published, 1880 to 2025. The lead has never changed hands.
The closest they came was 2009, when Rudolfo had 10 and Rudolph had 35.
Side by side
| Rudolfo | Rudolph | |
|---|---|---|
| Total US births | 2,263 | 53,638 |
| Most in one year | 70 | 1,700 |
| Babies in 2025 | under 5 | 25 |
| Estimated living today | 1,500 | 17,000 |
| Median age today | 54 | 65 |
| Peak year | 1955 | 1927 |
| Best rank | 885th boys | 110th boys |
| Rank in 2025 | unranked | 4,139th |
| First recorded | 1914 | 1880 |
| Girls / boys | 0 / 2,263 | 197 / 53,441 |
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 Rudolphs alive today are over 65; half the Rudolfos are over 54. That is 11 years between them: two names in use at the same time, worn by two different generations.
Where each one is strongest
- Rudolfo Texas (7.8×), New Mexico (7.1×), California (3.3×)
- Rudolph the District of Columbia (1.9×), South Carolina (1.6×), New York (1.6×)
How much commoner the name is in that state than it is nationally, from births recorded since 1910.
Compare something else
Related comparisons
Social Security Administration birth records, 1880–2025, public domain. Full histories: Rudolfo and Rudolph.