How Many People Are Named Cathy Moriarty?
There are approximately 4 people named Cathy Moriarty living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 85,688,585 Americans.
This estimate combines SSA birth records for the first name Cathy with Census Bureau frequency data for the surname Moriarty. Below you will find a breakdown of both names, including popularity trends, gender data, and ancestry information.
Estimated People with This Name
4
1 in 85,688,585 Americans
Combination Rarity
Very Rare
First Name
View full profileCathy
Last Name
View full profileMoriarty
Cathy: Popularity Over Time
Year-by-year SSA birth registrations for the first name Cathy. The peak year was 1958 with 10,961 births. The average person named Cathy today is 65 years old.
Ancestry of the Moriarty Surname
Self-reported race and ethnicity breakdown for people with the surname Moriarty, from the 2010 U.S. Census Bureau.
How we calculated this
The first name "Cathy" has an estimated frequency of 0.0369% among living Americans, based on SSA birth records from 1880 to 2024 adjusted for mortality using CDC 2023 life tables.
The surname "Moriarty" appears at a rate of 3.39 per 100,000 people in the 2010 U.S. Census.
Multiplying these frequencies against the U.S. population of ~343 million gives 4 estimated people. This assumes first names and last names are statistically independent. Full methodology.
Other people named Cathy
Cathy Moriarty: Questions and Answers
How many people are named Cathy Moriarty?
We estimate approximately 4 people named Cathy Moriarty are alive in the United States today. The first name Cathy is shared by 126,557 Americans, and the surname Moriarty is shared by 11,387.
How rare is the name Cathy Moriarty?
This name combination is classified as Very Rare, occurring at a rate of about 1 in 85,688,585 Americans. The first name Cathy is common and the surname Moriarty is uncommon.
Is Cathy a male or female name?
Cathy is predominantly female, with 0.2% of bearers being male and 99.8% female. It peaked in popularity in 1958 and the average bearer today is 65 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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