Terry Gilliam
There are approximately 39 people named Terry Gilliam living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 8,788,573 Americans.
This estimate combines SSA birth records for the first name Terry with Census Bureau frequency data for the surname Gilliam. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Expected bearers
39
1 in 8,788,573
Named Terry
393K
Alive today
Named Gilliam
34K
Alive today
US population
343M
Denominator
Estimated living: 393K
Rarity: Common
Gender: Unisex
Peak year: 1955
Average age: 63
Estimated bearers: 34K
Rarity: Uncommon
Census rank: #1,204
Per 100K: 9.97
Top ancestry: White (60.5%)
First name trend
Terry: popularity over time
Year-by-year SSA birth registrations for the first name Terry. The peak year was 1955 with 20,939 births. The average person named Terry today is 63 years old.
Babies born per year
Ethnicity
Ancestry of the Gilliam surname
Self-reported race and ethnicity breakdown for people with the surname Gilliam, from the 2010 US Census Bureau. The largest group is White at 60.5%.
- White60.5%
- Black or African American34.1%
- Two or more races2.5%
- Hispanic or Latino1.9%
- American Indian and Alaska Native0.6%
- Asian and Pacific Islander0.4%
Methodology
How we calculated this
The first name Terry has a living-bearer frequency of 0.1146% of the US population, based on 392,854 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
The surname Gilliam appears at a rate of 9.97 per 100,000 residents in the 2010 Census Bureau surname file, which translates to a frequency of 0.0100%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 39 people with the full name Terry Gilliam. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Terry
Related
Other people with the surname Gilliam
FAQ
Terry Gilliam: questions and answers
How many people are named Terry Gilliam?
We estimate approximately 39 people in the United States share the full name Terry Gilliam. That works out to about 1 in 8,788,573 Americans. This is calculated by combining the first-name frequency (0.1146%) with the surname frequency (9.97 per 100K) against the current US population.
How rare is the name Terry Gilliam?
We classify Terry Gilliam as "Very Rare". About 1 in 8,788,573 Americans share this exact first and last name combination.
Is Terry a male or female name?
Terry is predominantly unisex. Out of 521,274 total SSA registrations, 81.4% were male and 18.6% were female. See the full Terry profile for detailed gender data.
Where does this data come from?
First-name data comes from the Social Security Administration's national baby name files (1880 to 2024). Surname data comes from the 2010 US Census Bureau decennial surname tables. Living-bearer estimates use CDC actuarial life tables to adjust for mortality. Read the full methodology.