Recorded 1955–1979 Girls' name Peak 1958 108 births

Cythnia — girls' name

108 babies named Cythnia in U.S. Social Security records since 1955, with the highest year being 1958. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.

1950s231960s531970s32
1960s
Peak decade

49% of everyone ever named Cythnia was born in this single decade.

1958
Single peak year

10 babies were named Cythnia in 1958 — its busiest year on record.

What the Data Says About Cythnia

The Social Security Administration has registered 108 babies named Cythnia between 1955 and 1979, spanning 25 consecutive years of U.S. birth records. As a girl's name, Cythnia currently falls outside the top 1,000 girls' names for 1979. The name reached its historical peak in 1958, when 10 babies received it in a single year.

Decade-level aggregation shows that Cythnia performed strongest in the 1960s, accumulating 53 births during that ten-year window. Across the 3 decades of recorded activity, Cythnia shows notable generational variation in parental adoption.

No etymological entry is currently available for Cythnia in our reference dataset. These figures derive from SSA's annual national and state-level name files, which include any name appearing at least five times in a given year or state-year; names below that threshold are suppressed for privacy and therefore excluded from the totals shown here. The 108 total represents a lower bound — actual usage may be higher in years or states where the count fell below the disclosure floor. This page is provided for informational and research purposes only and does not constitute personal, legal, or naming advice.

Cythnia at a glance

Last recorded 1979

Total births

108

Since 1955

25 years of records

Peak year

1958

10 births that year

Strongest decade: 1960s

Current rank

Unranked

Outside the modern top-1,000

As of 1979

Active since

1955

Recorded for 25 years

Last year on file: 1979

Cythnia popularity over time

Annual U.S. births registered with the Social Security Administration · 1979–1955

Last recorded 1979
Peak year (1958)
10
Annual births at peak — across 25 years of records
4681012 197919721970196619641962196019581955 8

Cythnia by decade

Total births in each ten-year window — peak vs trough at a glance

Peak: 1960s
Peak decade
1960s
53 births that decade — 49% of Cythnia's all-time total
1950s231960s531970s32

Frequently Asked Questions

How popular is the name Cythnia?
108 babies have been named Cythnia since 1955. It was last recorded in 1979. The peak year was 1958 with 10 births.
When was Cythnia most popular?
Cythnia was most popular in the 1960s decade with 53 total births. The single peak year was 1958.
How long has the name Cythnia been used?
Cythnia has been recorded in Social Security data since 1955, spanning 25 years of data through 1979.
What names are similar to Cythnia?
Names with a similar sound or spelling include Cythia, Cythina, Cytlaly, Cytlali, and 2 more. These share a common prefix and are also used for girls.

Data Sources

Data as of 2024. Source: U.S. Social Security Administration (SSA).

Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications — National Data, 1955–1979 (ssa.gov/oact/babynames). National-level data includes all names with 5 or more occurrences in a given year.

State-level: Source: U.S. Social Security Administration, Baby Names — State-Level Files (namesbystate.zip). Includes all names with 5 or more occurrences per state per year; rarer names are excluded for privacy.