How Many People Are Named Rudolphus?
An estimated 8 people in the United States have the first name Rudolphus. It is almost exclusively a male name. The average bearer is 79 years old, and Rudolphus peaked in popularity in 1927 with 5 births that year.
Below you will find a full statistical profile of Rudolphus as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Rudolphus paired with any surname.
Key Insights
- With an average bearer age of 79, Rudolphus is a vintage name most associated with earlier generations. Most living bearers were born before 1957.
- Rudolphus is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
8
About 1 in 42,844,292 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
79
years old
Peak Year
1927
5 births
Total Registered
20
since 1880
Gender Distribution for Rudolphus
Rudolphus is almost exclusively a male name. Out of 20 total births registered, 100.0% were male.
Rudolphus as a male name
Ranked #4,123 in 1949
5 male births in 1949
Peak: 1927 (5 births)
Rudolphus: Popularity Over Time
SSA records for Rudolphus span from the 1920s to the 1940s, covering 3 decades of naming data. The most popular decade for this name was the 1940s, when 10 babies were registered. Rudolphus remains highly popular today, with recent registration numbers near its historical peak.
Rudolphus by Decade
How has Rudolphus tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
Rudolphus + Last Name Combinations
How many people share a full name with Rudolphus as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Rudolphus
Other first names starting with R with a similar number of bearers.
Rudolphus: Questions and Answers
How many people in the U.S. are named Rudolphus?
We estimate approximately 8 people named Rudolphus are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 42,844,292 Americans share this first name.
Is Rudolphus a common name?
Rudolphus is classified as "Very Rare" and is more popular than 24.6% of all first names in the SSA database. A total of 20 births have been registered with this name since 1880.
When was Rudolphus most popular?
Rudolphus reached peak popularity in 1927, when 5 babies were given this name. The average age of a living person named Rudolphus is approximately 79 years old, reflecting when the name was most commonly given.
Is Rudolphus a male name?
Rudolphus is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Rudolphus Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Rudolphus Smith, Rudolphus Johnson, Rudolphus Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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