Guilherme vs Guillermo

Side-by-side comparison of Guilherme and Guillermo — popularity rank, total births, peak decade, and historical trends from Social Security Administration data.

Name A

Guilherme

Boy name · Rank #12479

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Name B

Guillermo

Boy name · Rank #831

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Which name is more popular?

Metric Guilherme Guillermo
Current Rank #12479 #831
Total Births (all years) 514 31,807
Peak Year 2006 1998
Peak Year Births 39 693
Peak Decade 2000ss 1990ss
Gender Boy Boy
First Recorded Year 1921 1885

Births by Decade

Decade Guilherme Guillermo
1880ss — 5
1890ss — 13
1900ss — 44
1910ss — 253
1920ss 6 821
1930ss — 783
1940ss — 943
1950ss — 1,495
1960ss — 2,107
1970ss — 3,357
1980ss 6 4,364
1990ss 63 6,462
2000ss 257 6,095
2010ss 149 3,615
2020ss 33 1,450

Recent Annual Births (2014–present)

Year Guilherme Guillermo
2014 12 376
2015 12 389
2016 15 322
2017 18 289
2018 9 314
2019 17 320
2020 11 275
2021 10 299
2022 7 287
2023 — 292
2024 5 297

Data Sources

Source: U.S. Social Security Administration, Baby Names from Social Security Card Applications — National Data, ssa.gov/oact/babynames.
Source: SSA Annual Name Rankings, 1921–2024.

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