Orr-Ewing is a surname originating with the sons of William Ewing (1772–1853) and Susan Orr (1785–1860) who combined their parents' surnames and became Orr-Ewing.
Alice Orr-Ewing (born 1989), British actress Andrew Orr-Ewing (born 1965), British chemist Sir Archibald Orr-Ewing (1818–1893), Scottish politician Charles Lindsay Orr-Ewing (1860–1903), Scottish politician Ian Leslie Orr-Ewing (1893–1958), British politician Ian Orr-Ewing, Baron Orr-Ewing (1912–1999), British politician
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