Quilliam is a surname of Manx origin, meaning "William's son" (Manx: mac William), and may refer to:

  • John Quilliam (1771–1829), a British Royal Navy officer and the First Lieutenant on HMS Victory at the Battle of Trafalgar
  • Peter Quilliam (1920–2004), a New Zealand lawyer
  • Peter Quilliam (pharmacologist) (1915–2003), a British pharmacologist
  • Susan Quilliam (born 1950), an agony aunt and author noted for bringing systemic psychology to a mass audience
  • Wayne Quilliam (born 1963), Australian photographer
  • William Abdullah Quilliam (1856–1932), a 19th-century convert from Christianity to Islam, founder of England's first mosque and Islamic centre

Other things named Quilliam

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