Boy · #901 in 2025

Guillermo

Guillermo: popularity and trends since 1880

Popularity, 1880–2025

per 100,000 boys born

Guillermo per 100,000 boys born, by year. Peak: 1996. Gaps are years with fewer than five births, which SSA does not publish. Source: SSA, 1880–2025.

Guillermo has held steady: its share of boys born has barely moved over the last 10 years. It now stands at 42% of its 1996 peak.

Names of the other sex that are about as common right now, so two siblings' names do not sound a generation apart.