How Many People Are Named Guilio?
An estimated 3 people in the United States have the first name Guilio. It is almost exclusively a male name. The average bearer is 96 years old, and Guilio peaked in popularity in 1927 with 8 births that year.
Below you will find a full statistical profile of Guilio 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 Guilio paired with any surname.
Key Insights
- With an average bearer age of 96, Guilio is a vintage name most associated with earlier generations. Most living bearers were born before 1940.
- Guilio is exceptionally rare. Fewer than 100 people with this name are estimated to be alive in the U.S. today.
Estimated Living Americans
3
About 1 in 114,251,446 people in the U.S.
Rarity
Very Rare
Predicted Gender
Male
100.0% confidence
Average Age
96
years old
Peak Year
1927
8 births
Total Registered
26
since 1880
Gender Distribution for Guilio
Guilio is almost exclusively a male name. Out of 26 total births registered, 100.0% were male.
Guilio as a male name
Ranked #3,287 in 1941
6 male births in 1941
Peak: 1927 (8 births)
Guilio: Popularity Over Time
SSA records for Guilio span from the 1920s to the 1940s, covering 2 decades of naming data. The most popular decade for this name was the 1920s, when 20 babies were registered. Guilio has declined significantly from its peak in the 1920s. Recent registrations are a fraction of what they were at the name's height.
Guilio by Decade
How has Guilio 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.
Guilio + Last Name Combinations
How many people share a full name with Guilio as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Guilio
Other first names starting with G with a similar number of bearers.
Guilio: Questions and Answers
How many people in the U.S. are named Guilio?
We estimate approximately 3 people named Guilio 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 114,251,446 Americans share this first name.
Is Guilio a common name?
Guilio is classified as "Very Rare" and is more popular than 4.9% of all first names in the SSA database. A total of 26 births have been registered with this name since 1880.
When was Guilio most popular?
Guilio reached peak popularity in 1927, when 8 babies were given this name. The average age of a living person named Guilio is approximately 96 years old, reflecting when the name was most commonly given.
Is Guilio a male name?
Guilio is predominantly male. 100.0% of people with this name are male. See the gender breakdown above for full details.
How many Guilio Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Guilio Smith, Guilio Johnson, Guilio 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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