How Many People Are Named Robert Alfonso?
There are approximately 116 people named Robert Alfonso living in the United States today. That makes this name combination uncommon, occurring at a rate of about 1 in 2,954,779 Americans.
This estimate combines SSA birth records for the first name Robert with Census Bureau frequency data for the surname Alfonso. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Estimated People with This Name
116
1 in 2,954,779 Americans
Combination Rarity
Uncommon
First Name
View full profileRobert
Last Name
View full profileAlfonso
Robert: Popularity Over Time
Year-by-year SSA birth registrations for the first name Robert. The peak year was 1947 with 91,891 births. The average person named Robert today is 60 years old.
Ancestry of the Alfonso Surname
Self-reported race and ethnicity breakdown for people with the surname Alfonso, from the 2010 U.S. Census Bureau.
How we calculated this
The first name "Robert" has an estimated frequency of 0.817% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.
The surname "Alfonso" appears at a rate of 4.15 per 100,000 people in the 2010 U.S. Census.
Multiplying these frequencies against the U.S. population of ~343 million gives 116 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Robert
Robert Alfonso: Questions and Answers
How many people are named Robert Alfonso?
We estimate approximately 116 people named Robert Alfonso are alive in the United States today. The first name Robert is shared by 2,799,566 Americans, and the surname Alfonso is shared by 13,940.
How rare is the name Robert Alfonso?
This name combination is classified as Uncommon, occurring at a rate of about 1 in 2,954,779 Americans. The first name Robert is very common and the surname Alfonso is uncommon.
Is Robert a male or female name?
Robert is predominantly male, with 99.6% of bearers being male and 0.4% female. It peaked in popularity in 1947 and the average bearer today is 60 years old.
Where does this data come from?
First name data comes from the Social Security Administration (1880 to 2024), adjusted for survival using CDC 2023 life tables. Surname data comes from the 2010 U.S. Census Bureau. Full methodology.
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