How Many People Are Named John Iliff?
There are approximately 13 people named John Iliff living in the United States today. That makes this name combination rare, occurring at a rate of about 1 in 26,365,718 Americans.
This estimate combines SSA birth records for the first name John with Census Bureau frequency data for the surname Iliff. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Estimated People with This Name
13
1 in 26,365,718 Americans
Combination Rarity
Rare
First Name
View full profileJohn
Last Name
View full profileIliff
John: Popularity Over Time
Year-by-year SSA birth registrations for the first name John. The peak year was 1947 with 88,524 births. The average person named John today is 57 years old.
Ancestry of the Iliff Surname
Self-reported race and ethnicity breakdown for people with the surname Iliff, from the 2010 U.S. Census Bureau.
How we calculated this
The first name "John" has an estimated frequency of 0.858% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.
The surname "Iliff" appears at a rate of 0.45 per 100,000 people in the 2010 U.S. Census.
Multiplying these frequencies against the U.S. population of ~343 million gives 13 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named John
John Iliff: Questions and Answers
How many people are named John Iliff?
We estimate approximately 13 people named John Iliff are alive in the United States today. The first name John is shared by 2,941,241 Americans, and the surname Iliff is shared by 1,512.
How rare is the name John Iliff?
This name combination is classified as Rare, occurring at a rate of about 1 in 26,365,718 Americans. The first name John is very common and the surname Iliff is rare.
Is John a male or female name?
John 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 57 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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