The district which bears these two names was in 1864 separated from the mother parish of Hampton by order of the Queen in Council. Perhaps the following extracts from this “Order” may throw some light on this apparently perplexing question:

ORDER OF QUEEEN IN COUNCIL. At the Court at Windsor, the 7th day of April, 1864. Present: The Queen’s Most Excellent Majesty in Council.
After some preliminary remarks, there is introduced a representation made to Her Majesty by the Ecclesiastical Commissioners of England as follows :- “Whereas, it appears to us to be expedient that a New Parish should be assigned to the said Church of Saint James, situate at Hampton Hill”; and again, “it would, in our opinion, be expedient that all that part of the said parish of Hampton which is described in the schedule hereunder written (all lying north of the Hampton Edge road and the Longford river) should be assigned to the said Church, and that the same should be named “The New Parish* of Hampton Hill.”

And it goes on to say, “Whereas the said representation has been approved by Her Majesty in Council: now, therefore, Her Majesty, by and with the advice of Her said Council, is pleased hereby to ratify the said representation, and to order and direct that the same and every part thereof shall be effectual in law.”

It would appear therefore that “Hampton Hill “is the name “effectual in law” and should be used in all legal descriptions of the place. There is no higher authority than this Order in Council.

* In the original “district chapelry,” but by an Act passed since, all district chapelries having become New Parishes, the words “New Parish is inserted to make the sense clearer."

Source: The Hampton Hill Parish Magazine - 1885 February