Guillermo
A boys’ name of Germanic origin, meaning resolute protector; a form of William.
Babies a year
287
the US, 2017
Rarity
Rare
among names in use
US popularity
#902
down from #832
UK popularity
—
outside the ONS list
How Guillermo has moved
View as table
| Year | US rank |
|---|---|
| 2015 | #662 |
| 2016 | #754 |
| 2017 | #795 |
| 2018 | #751 |
| 2019 | #746 |
| 2020 | #832 |
| 2021 | #812 |
| 2022 | #843 |
| 2023 | #839 |
| 2024 | #832 |
| 2025 | #902 |
Guillermo was given to 287 American babies in 2017 — the most recent full year we hold. Its US peak was 693 in 1998.
Looking further back: between 1880 and 2008, Guillermo was most common in 2000, when it went to 0.03% of American babies of that sex.
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