Origin:German
Popularity:1570
Meaning:will helmet or protection
Guillermo as a boy's name is of Old German origin, and the meaning of Guillermo is "will helmet or protection".

Famous Guillermos

Wondering who else shares this name? Check out these well known people who made this baby name famous.
  • Guillermo Vilas
    Tennis Player

Popularity Trend Chart

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Source: Social Security Administration

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