Cj Wainaina
There are approximately 1 people named Cj Wainaina living in the United States today. That makes this name combination very rare, occurring at a rate of about 1 in 342,754,338 Americans.
This estimate combines SSA birth records for the first name Cj with Census Bureau frequency data for the surname Wainaina. Below you will find a breakdown of both names, including popularity trends, gender data, and Census demographics where available.
Expected bearers
1
1 in 342,754,338
Named Cj
1.5K
Alive today
Named Wainaina
441
Alive today
US population
343M
Denominator
Estimated living: 1.5K
Rarity: Rare
Gender: Male
Peak year: 1994
Average age: 23
Estimated bearers: 441
Rarity: Very Rare
Census rank: #57,177
Per 100K: 0.13
Top ancestry: Black (91.9%)
First name trend
Cj: popularity over time
Year-by-year SSA birth registrations for the first name Cj. The peak year was 1994 with 55 births. The average person named Cj today is 23 years old.
Babies born per year
Ethnicity
Ancestry of the Wainaina surname
Self-reported race and ethnicity breakdown for people with the surname Wainaina, from the 2020 US Census Bureau. The largest group is Black at 91.9%.
The bar chart below shows how people with the surname Wainaina described their own race and ethnicity on the 2020 Census form. These are self-reported numbers, and they describe the population who happened to carry the surname Wainaina at the time of the Census. A surname does not determine a person's race or ethnicity.
- Black or African American91.9% · 354
- Two or more races3.9% · 15
- White3.1% · 12
- Hispanic or Latino0.5% · 2
- Asian and Pacific Islander0.3% · 1
- American Indian and Alaska Native0.3% · 1
Methodology
How we calculated this
The first name Cj has a living-bearer frequency of 0.0004% of the US population, based on 1,499 estimated living Americans carrying this first name (from SSA birth records going back to 1880, adjusted for mortality using CDC life tables).
The surname Wainaina appears at a rate of 0.13 per 100,000 residents in the 2020 Census Bureau surname file, which translates to a frequency of 0.0001%.
Multiplying these two independent frequencies against the current US population of 342,754,338 gives an expected count of approximately 1 people with the full name Cj Wainaina. This assumes statistical independence between first and last names, which is a simplification but produces reasonable estimates for most combinations.
Related
Other people named Cj
Related
Other people with the surname Wainaina
FAQ
Cj Wainaina: questions and answers
How many people are named Cj Wainaina?
We estimate approximately 1 people in the United States share the full name Cj Wainaina. That works out to about 1 in 342,754,338 Americans. This is calculated by combining the first-name frequency (0.0004%) with the surname frequency (0.13 per 100K) against the current US population.
How rare is the name Cj Wainaina?
We classify Cj Wainaina as "Very Rare". About 1 in 342,754,338 Americans share this exact first and last name combination.
Is Cj a male or female name?
Cj is predominantly male. Out of 1,529 total SSA registrations, 91.3% were male and 8.7% were female. See the full Cj 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 2020 US Census Bureau decennial surname tables. Living-bearer estimates use CDC actuarial life tables to adjust for mortality. Read the full methodology.
How many Americans are named Cj Wainaina?
For a quick modern estimate, our sister site HowManyOfMe.org answers that in one glance, with the living-bearer count front and centre.