Save Type Surname (from given name) Usage English Pronounced Pron. /ˈwɑt/ [key·simplify] Meaning & HistoryExpand Links Derived from the Middle English given name Wat or Watt, a diminutive of the name Walter. A noteworthy bearer was the Scottish inventor James Watt (1736-1819). Related NamesDetails RootWat (given name)VariantsWalter, Walters, Walterson, Waters, Watkins, Watson, WattsOther Languages & CulturesWouters, Wauters, Wolters(Dutch) Gauthier, Gautier(French) Walter, Walther, Welter, Wolter(German) Watson(Scottish) Gutiérrez, Gutierrez(Spanish) Waltersson(Swedish) Categories English nouns, lightkeepers, units of measurement, word names