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English (mainly North and Midlands) and Scottish: occupational name for a fuller from Middle English walker Old English wealcere (an agent derivative of wealcan ‘to walk tread’) ‘one who trampled cloth in a bath of lye or kneaded it in order to strengthen it’. This was the regular term for the occupation during the Middle Ages in western and northern England. Compare Fuller and Tucker . As a Scottish surname it has also been used as a translation of Gaelic Mac an Fhucadair ‘son of the fuller’. This surname is also very common among African Americans.
Source: Dictionary of American Family Names 2nd edition, 2022