Boy name
Guillermo
Guillermo is currently the #901 boy name in the United States, based on 2025 Social Security data. In raw numbers: 264 babies. Its position has barely moved over the past five years — a sign of steady, established appeal. Looking at the full record since 1885, Guillermo hit its all-time high of #352 in 1996, when 692 boys were given the name. State by state, Arizona leads the way at #432.
Rankings
2025 rank
#901
among boy names
Trend
Stable
last 5 years
All-time peak
#352
in 1996 (1990s)
Babies in 2025
264
boys named Guillermo
Guillermo popularity, 1880–2025
Where Guillermo is most popular
Share of boys born in 2025:lowhighno data (< 5 births)
Strongest states: Arizona (#432), Nevada (#516), Texas (#519)
Uniqueness score
51/ 100Balanced
everywhereone of a kind
Well known, but far from crowded — the middle of the field. Based on how many babies per birth were named Guillermo in the most recent year of SSA data.