This thread fascinated me as my Great Grandmother was one Mabel Barry Whitehead (1883-1945), the second daughter of Lt Col Edmund Whitehead and Georgiana Sarah Carr. Edmund was the fourth son of John Whitehead of Barnjet and Mary Milles. A few years ago I was sent a number of individual trees which had been compiled by Vera Whitehead's son, Charles Evans, so I have fairly complete information about this family, and would be happy to share my knowledge with anyone who was interested!
John Whitehead (1796-1879) was the son of Charles Whitehead (1755-1833) of Ash Place and Mary Miller. This Charles was the son of the Rev Charles Whitehead (1719-1792), who was vicar of East Grinstead in Sussex, and Anne Dunstan. His father was Gervase Whitehead (1690-1739) and Elizabeth Rogis or Bovis. Gervase (another name which stuck in the Whitehead family) was gardner at Knole for the Sackville family.
The Whiteheads are an interesting bunch. My Gt Gt Grandfather was Chief Magistrate on Heligoland when it was handed over to the Germans in exchange for Zanzibar in 1890. His brother, Charles, was the first agricultural adviser to the Privy Council, and was knighted for his efforts. If you read this Debra, I'd be interested to see the memoir and have photos of Barming House and various Whiteheads which I could send on.
Hope this is of some help.
Robert