Peto lived at Kirby House at Inkpen in Berkshire. He was created a Baronet, of Barnstaple in the County of Devon, in January 1927. He died in January 1945, at Trowbridge, Wiltshire, aged 82. He was succeeded by his elder son James Michael Peto (1894-1971). A younger son Christopher (1897-1980) succeeded his elder brother and also served as MP for Barnstaple.
Kidd, Charles, Williamson, David (editors). Debrett's Peerage and Baronetage (1990 edition). New York: St Martin's Press, 1990.