Kingscote came from a family that had held the manor of Kingscote, Gloucestershire since the 11th century. He was the son of Colonel Thomas Henry Kingscote and his second wife, the Honourable Harriott Mary Anne Kingscote, daughter of Lieutenant-General Benjamin Bloomfield, 1st Baron Bloomfield of Ciamaltha, Newport, Tipperary, Ireland.
On 31 August 1872, he married the Honourable Evelyn Mary Gifford, the fourth daughter of Robert Gifford, 2nd Baron Gifford. His son, Major Edric Kingscote, succeeded him as Gentleman Usher, but the post of Gentleman of the Cellars was abolished. His other son was Maurice John Kingscote.
His half-brother, Colonel Sir Robert Kingscote, also later served in the Royal Household as Equerry to King Edward VII.
- Obituary, The Times, 23 September 1935