Thelmer — boys' name
142 babies named Thelmer in U.S. Social Security records since 1910, with the highest year being 1915. Year-by-year trend, decade aggregates, and state-level rankings drawn from federal birth data.
48% of everyone ever named Thelmer was born in this single decade.
13 babies were named Thelmer in 1915 — its busiest year on record.
What the Data Says About Thelmer
The Social Security Administration has registered 142 babies named Thelmer between 1910 and 1938, spanning 29 consecutive years of U.S. birth records. As a boy's name, Thelmer currently falls outside the top 1,000 boys' names for 1938. The name reached its historical peak in 1915, when 13 babies received it in a single year. Thelmer is classified as unisex in SSA records: the opposite-sex variant accounts for 47 additional births since 1913.
Decade-level aggregation shows that Thelmer performed strongest in the 1910s, accumulating 68 births during that ten-year window. Across the 3 decades of recorded activity, Thelmer shows a clear decline from its mid-century high.
No etymological entry is currently available for Thelmer 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 142 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.
Thelmer at a glance
Last recorded 1938Peak year
Current rank
Active since
Thelmer popularity over time — boys
Annual U.S. births registered with the Social Security Administration · 1938–1910
- Peak year (1915)
- 13
- Annual births at peak — across 29 years of records
No longer in the modern top-1000 — last recorded 1938.
142 total births across 29 years of SSA records. Peaked in 1915 with 13 births in a single year.
Thelmer popularity over time — girls
47 total births recorded since 1913 (Thelmer as girls' name)
Unisex use is substantial
The girls' variant of Thelmer accounts for 25% of total recorded use across both genders.
Thelmer by decade
Total births in each ten-year window — peak vs trough at a glance
- Peak decade
- 1910s
- 68 births that decade — 48% of Thelmer's all-time total
Thelmer decade highlights
- Peak decade 68 births
- Runner-up 59 births
- Modern era share 2010s + 2020s
- Decades tracked with recorded births
1910s was Thelmer's strongest decade
68 babies received the name during that ten-year window — about 48% of all-time use.
Frequently Asked Questions
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Keep exploring Thelmer
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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, 1910–1938 (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.