The correct spelling of the word "grimmett" is actually "Grimmet." The word is phonetically spelled as /ˈɡrɪmɪt/, with the stress on the first syllable. The spelling includes a double "m" and a single "t," which may seem odd, but it follows the standard English spelling rules. This surname's origin is English, with the earliest recordings dating back to the 16th century. Today, the name is still used as both a first and last name in the UK and US.