Whitney Duncan MacMillan

W. Duncan MacMillan
Born	Whitney Duncan MacMillan July 5, 1930
Died	October 31, 2006 Jupiter, Florida
Occupation	Business executive
Title	Director of Cargill
Spouse(s)	Sarah Stevens (died 1995) Nivin
Children	Four
Parent(s)	John H. MacMillan, Jr. Marion Dickson
Relatives	John Hugh MacMillan (brother) Marion MacMillan Pictet (sister) William W. Cargill (great-grandfather)

Whitney Duncan MacMillan (July 5, 1930 - October 31, 2006) was an American businessman, a director of Cargill.

He was born on July 5, 1930, the son of John H. MacMillan, Jr. and Marion Dickson. He graduated from Brown University in Providence, Rhode Island.

MacMillan was a board member of Cargill for three decades. He wrote the MacMillan-Cargill family history and led several companies, some of which he established himself.

MacMillan married twice. His first wife, Sarah Stevens, died in 1995. They had four daughters, Sarah MacMillan of California, Katherine Tanner of Florida, and Lucy Stitzer and Alexandra Daitch, both of Connecticut, all of whom survived him. He was also survived by his second wife, Nivin, of Wayzata.

MacMillan died on October 31, 2006 of an apparent heart attack at his winter home near Jupiter, Florida, aged 76.

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