Recorded 1979–2018 Girls' name Peak 1991 366 births

Thy — girls' name

366 babies named Thy in U.S. Social Security records since 1979, with the highest year being 1991. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.

1970s51980s1061990s842000s1002010s71
1980s
Peak decade

29% of everyone ever named Thy was born in this single decade.

1991
Single peak year

18 babies were named Thy in 1991 — its busiest year on record.

What the Data Says About Thy

The Social Security Administration has registered 366 babies named Thy between 1979 and 2018, spanning 40 consecutive years of U.S. birth records. As a girl's name, Thy currently falls outside the top 1,000 girls' names for 2018. The name reached its historical peak in 1991, when 18 babies received it in a single year.

Decade-level aggregation shows that Thy performed strongest in the 1980s, accumulating 106 births during that ten-year window. Across the 5 decades of recorded activity, Thy shows notable generational variation in parental adoption. Geographically, the name is most concentrated in California, which accounts for 69 births — the largest state-level total in the dataset — followed by . In total, SSA state-level files list Thy in 1 of the 51 U.S. reporting jurisdictions.

No etymological entry is currently available for Thy 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 366 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.

Thy at a glance

Last recorded 2018

Total births

366

Since 1979

40 years of records

Peak year

1991

18 births that year

Strongest decade: 1980s

Current rank

Unranked

Outside the modern top-1,000

As of 2018

Active since

1979

Recorded for 40 years

Last year on file: 2018

Thy popularity over time

Annual U.S. births registered with the Social Security Administration · 2018–1979

Last recorded 2018
Peak year (1991)
18
Annual births at peak — across 40 years of records
05101520 201820122007200219951990198519801979 5

Thy by decade

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

Peak: 1980s
Peak decade
1980s
106 births that decade — 29% of Thy's all-time total
1970s51980s1061990s842000s1002010s71

Thy by state

Where Thy concentrates geographically — total births since 1979

Geographically diffuse
Top 1 states by recorded births for the name Thy
Rank State Visual share Births Share of total
#1 California
69 18.9%
California share of Thy's total US births 18.9%

69 of 366 births nationwide.

Frequently Asked Questions

How popular is the name Thy?
366 babies have been named Thy since 1979. It was last recorded in 2018. The peak year was 1991 with 18 births.
When was Thy most popular?
Thy was most popular in the 1980s decade with 106 total births. The single peak year was 1991.
Where is Thy most popular?
The top states for the name Thy are California (69 births).
How long has the name Thy been used?
Thy has been recorded in Social Security data since 1979, spanning 40 years of data through 2018.
What names are similar to Thy?
Names with a similar sound or spelling include Thyra, Thyri, Thyme, Thyda, and 4 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, 1979–2018 (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.