Total births
142
Unisex name · since 1910
Thelmer
Thelmer has 142 recorded births since 1910 in federal Social Security data, most heavily in 1915 -- full year-by-year trend, decade aggregates, and state rankings follow.
- 142
- total births
- 1910–1938
- years on record
- 1910s
- peak decade
- 48%
- born in that decade
Thelmer is not among the current top-ranked boys names; 142 have been recorded since 1910.
Thelmer has 142 recorded births among boys since 1910, per the U.S. Social Security Administration, though it falls outside today's most-used boys names, busiest in the 1910s -- see the year-by-year trends, decade totals, and state-level distribution below, all drawn directly from SSA birth-registration files spanning 1910 to 1938.
- 142 total births
- 1910–1938 years on record
- 1910s peak decade
- 48% born in that decade
Data updated Jun 2026
The verdict
142 boys have been named Thelmer since 1910, peaking in the 1910s, last recorded in 1938.
- 142
- total births
- 1910–1938
- years on record
- 1910s
- peak decade
- 48%
- born in that decade
1910s
Peak decade
48% of everyone ever named Thelmer was born in this single decade.
1915
Single peak year
13 babies were named Thelmer in 1915 - its busiest year on record.
Thelmer's usage pattern, beyond the headline number
Thelmer splits its recorded history at 1921: 46% of all births land in the more recent half, 54% in the earlier half, an evenly balanced pattern over time. The single quietest year was 1910 (5 births) -- compare that against the 1915 peak of 13 for a sense of just how much the name's popularity has swung.
Thelmer at a glance
Last recorded 1938Peak year
1915
Current rank
Unranked
Active since
1910
Thelmer popularity over time - boys
Annual U.S. births registered with the Social Security Administration · 1910–1938
- Peak year (1915)
- 13
- Annual births at peak, across 29 years of records
Thelmer popularity over time - girls
47 total births recorded since 1913 (Thelmer as girls' name)
Thelmer by decade
Total births in each ten-year window, peak vs trough at a glance
1910s was Thelmer's strongest decade.
68 babies received the name during that ten-year window, about 48% of all-time use.
Thelmer births by decade
Total births in each ten-year window
- 1910s
1910s
68 births
- 1920s
1920s
59 births
- 1930s 15
1930s
15 births
What this shows Peak: 1910s at 68 births (48% of all-time use).
Frequently Asked Questions
How popular is the name Thelmer? ▼
Thelmer has been given to 142 babies in the U.S. since 1910, according to SSA data. Its last appearance in the data was 1938. 13 babies were born in 1915, its single highest year.
When was Thelmer most popular? ▼
Thelmer was most popular in the 1910s decade with 68 total births. The single peak year was 1915.
Is Thelmer a unisex name? ▼
Yes, Thelmer is used for both boys and girls. As a boy's name it has 142 births, and as a girl's name it has 47 births.
How long has the name Thelmer been used? ▼
Thelmer has been recorded in Social Security data since 1910, spanning 29 years of data through 1938.
What names are similar to Thelmer? ▼
Names with a similar sound or spelling include Theodore, Theo, Theron, Theadore, and 4 more. These share a common prefix and are also used for boys.
What to do with Thelmer's data
- Thelmer's decade-level peak was the 1910s (68 total births); usage has since declined to 15 in the 1930s -- if you're weighing a "classic revival" angle, the trend line argues against it.
- Weighing it against an alternative? Put two names side by side. Compare names
Figures reflect SSA-reported births only; see the methodology above for the privacy-suppression floor.
Keep exploring Thelmer
Nearby Names Like Thelmer
Names with a similar sound, spelling, or feel to Thelmer
Theodore Boy
#4 317,206 births
Theo Boy
#80 35,830 births
Theron Boy
#2837 12,960 births
Theadore Boy
#9912 4,005 births
Theophilus Boy
#2213 2,448 births
Compare Thelmer side by side: Thelmer vs Theodore Thelmer vs Theo Thelmer vs Theron
Related Names
Names with a similar number of total births
Data Sources
Data as of June 2026. Source: U.S. Social Security Administration (SSA).
According to the Social Security Administration, this profile draws directly from the agency's public-use baby-name files (updated June 2026). See our methodology for the full extraction, aggregation, and privacy-suppression rules.
Primary: Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications, National Data, 1910–1938 (ssa.gov/oact/babynames).
State-level: Source: U.S. Social Security Administration, Baby Names, State-Level Files (namesbystate.zip).
Cite this page
NameAlmanac Editorial. "Thelmer: Baby Name Since 1910 - 142 Births, Peak 1915." NameAlmanac. Accessed via https://namealmanac.com/name/thelmer. Licensed CC BY-SA 4.0.
Name Almanac is rendered directly from the Social Security Administration's public baby-name files, no number is typed in by an editor. This profile for Thelmer draws directly on SSA national and state-level files, no figure is typed in by an editor. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of June 2026.