A surname common in Dutch and English-speaking countries, also a place name in several U.S. states.
From Dutch 'de Witt' (of the white), a geographical surname where 'de' means 'of' and 'witt' refers to white color or white land.
The De Witt brothers in 17th-century Holland were famous mathematicians and statesmen, but their names were graphically misspelled in sources, showing how surnames weren't standardized until the 1800s.
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