Gref is a German surname, derived from the noble title Graf.https://www.ancestry.com/name-origin?surname=graf It also means "Grave" in the Frisian language. Notable people with the surname include:
Herman Gref (born 1964), Russian politician and businessman Lynn G. Gref (born 1941), American technologist and systems engineer
Other uses General Reserve Engineer Force, part of the Border Roads Organisation
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