Doull is a surname that is sourced mainly to Scotland, England, and Ireland. Doull is a variant of the Gaelic name MacDomhnall which means 'son of Donald'. Variants included Donnell, Donaldson and Doole.

People with the surname Doull Alexander Doull (1870–1933), Anglican bishop Bruce Doull (born 1950), former Australian rules football player Doug Doull (born 1974), Canadian ice hockey player James Doull (1918–2001), Canadian philosopher John Doull (1878–1969), Canadian judge and politician Judi Doull (born 1938), New Zealand cricketer Lincoln Doull (born 1964), New Zealand cricketer Owain Doull (born 1993), Welsh cyclist Robert Doull (1828–1906), Canadian politician Simon Doull (born 1969), New Zealand cricketer

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