Recorded 1947–1977 Girls' name Peak 1954 556 births

Cyd — girls' name

556 babies named Cyd in U.S. Social Security records since 1947, with the highest year being 1954. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.

1940s341950s2561960s2071970s59
1950s
Peak decade

46% of everyone ever named Cyd was born in this single decade.

1954
Single peak year

45 babies were named Cyd in 1954 — its busiest year on record.

What the Data Says About Cyd

The Social Security Administration has registered 556 babies named Cyd between 1947 and 1977, spanning 31 consecutive years of U.S. birth records. As a girl's name, Cyd currently falls outside the top 1,000 girls' names for 1977. The name reached its historical peak in 1954, when 45 babies received it in a single year.

Decade-level aggregation shows that Cyd performed strongest in the 1950s, accumulating 256 births during that ten-year window. Across the 4 decades of recorded activity, Cyd shows a clear decline from its mid-century high. Geographically, the name is most concentrated in California, which accounts for 11 births — the largest state-level total in the dataset — followed by Illinois and Texas. In total, SSA state-level files list Cyd in 5 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Cyd 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 556 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.

Cyd at a glance

Last recorded 1977

Total births

556

Since 1947

31 years of records

Peak year

1954

45 births that year

Strongest decade: 1950s

Current rank

Unranked

Outside the modern top-1,000

As of 1977

Active since

1947

Recorded for 31 years

Last year on file: 1977

Cyd popularity over time

Annual U.S. births registered with the Social Security Administration · 1977–1947

Last recorded 1977
Peak year (1954)
45
Annual births at peak — across 31 years of records
01020304050 19771971196719631959195519511947 8

Cyd by decade

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

Peak: 1950s
Peak decade
1950s
256 births that decade — 46% of Cyd's all-time total
1940s341950s2561960s2071970s59

Cyd by state

Where Cyd concentrates geographically — total births since 1947

Geographically diffuse
Top 5 states by recorded births for the name Cyd
Rank State Visual share Births Share of total
#1 California
11 2.0%
#2 Illinois
10 1.8%
#3 Texas
10 1.8%
#4 New York
6 1.1%
#5 Michigan
5 0.9%
California share of Cyd's total US births 2.0%
Even split

11 of 556 births nationwide. Compared to a flat distribution across 5 reporting states.

Frequently Asked Questions

How popular is the name Cyd?
556 babies have been named Cyd since 1947. It was last recorded in 1977. The peak year was 1954 with 45 births.
When was Cyd most popular?
Cyd was most popular in the 1950s decade with 256 total births. The single peak year was 1954.
Where is Cyd most popular?
The top states for the name Cyd are California (11 births), Illinois (10 births), Texas (10 births).
How long has the name Cyd been used?
Cyd has been recorded in Social Security data since 1947, spanning 31 years of data through 1977.
What names are similar to Cyd?
Names with a similar sound or spelling include Cydney, Cydnee, Cydni, Cydnie, and 3 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, 1947–1977 (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.