John Ravenhill's eldest son, John Richard Ravenhill (1824–1894) was an engineer in the firm of Miller, Ravenhill and Co (Richard Ravenhill, brother of John Ravenhill of Ashton Gifford, was a founding partner). The second son became Major General Philip Ravenhill who was the Commanding Royal Engineer in Gibraltar. The third son was the Reverend Canon Henry Everett Ravenhill (died 1913). The fifth son, William Waldon Ravenhill, was a lawyer (called to the bar in April 1862). The family were actively involved in the Codford St Peter School, with John Ravenhill providing much of the funding. An annual school fete took place, at which students from the "Sunday, National, and Night" schools were entertained (on the lawn, not in the house) and provided with tea and cake. John Ravenhill died in 1878, apparently having moved out of the house to London some time before his death