How Many People Are Named Gillian Armstrong?
There are approximately 7 people named Gillian Armstrong living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 48,964,905 Americans.
This estimate combines SSA birth records for the first name Gillian with Census Bureau frequency data for the surname Armstrong. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Estimated People with This Name
7
1 in 48,964,905 Americans
Combination Rarity
Very Rare
First Name
View full profileGillian
Last Name
View full profileArmstrong
Gillian: Popularity Over Time
Year-by-year SSA birth registrations for the first name Gillian. The peak year was 1999 with 1,030 births. The average person named Gillian today is 31 years old.
Ancestry of the Armstrong Surname
Self-reported race and ethnicity breakdown for people with the surname Armstrong, from the 2010 U.S. Census Bureau.
How we calculated this
The first name "Gillian" has an estimated frequency of < 0.0001% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.
The surname "Armstrong" appears at a rate of 45.78 per 100,000 people in the 2010 U.S. Census.
Multiplying these frequencies against the U.S. population of ~343 million gives 7 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Gillian
Other people with the surname Armstrong
Gillian Armstrong: Questions and Answers
How many people are named Gillian Armstrong?
We estimate approximately 7 people named Gillian Armstrong are alive in the United States today. The first name Gillian is shared by 15,315 Americans, and the surname Armstrong is shared by 153,772.
How rare is the name Gillian Armstrong?
This name combination is classified as Very Rare, occurring at a rate of about 1 in 48,964,905 Americans. The first name Gillian is uncommon and the surname Armstrong is common.
Is Gillian a male or female name?
Gillian is predominantly female, with 0.4% of bearers being male and 99.6% female. It peaked in popularity in 1999 and the average bearer today is 31 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.
Try another name
How Many of Me