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- See Jefferies for other articles with titles that contain, either by relationship or by coincidence, this character's surname.
Benjamin McDonald-Jefferies was a male human civilian engineer who worked for the New Bell Laboratories in the Alpha Centauri system during the 22nd century. He was the child of Captain George William Jefferies and Jennifer Anne MacIntyre. He married Isobelle Krautman, and they had one son, Frederick William Jefferies.