(Sir) John Marks Templeton was an investor and mutual fund pioneer. Templeton was born in the town of Winchester, Tennessee. He attended Yale University and was selected for membership in the Elihu society. Templeton graduated in 1934 near the top of his class. He attended Oxford University as a Rhodes Scholar and graduated with a M.A. in law.
Templeton married Judith Folk in 1937 and the couple had three children: John Jr., Anne and Christopher. Judith died in February 1951 in a motorbike accident. He then married Irene Reynolds Butler in 1958; she died in 1993.
He was a lifelong member of the Presbyterian Church. He served as an elder of the First Presbyterian Church of Englewood (NJ). He was a trustee on the board of Princeton Theological Seminary, the largest Presbyterian seminary, for 42 years and served as its chair for 12 years.