Harrow International School New York is scheduled to be the first American affiliate of the 450-year-old Harrow School in London, whose alumni include Winston Churchill and Benedict Cumberbatch.

Winston Churchill, Robert Peel, Lord Palmerston, King Hussein of Jordan, and India’s first prime minister, Jawaharlal Nehru.

The Harrow School, a 450-year-old London institution charging $75K per year for full board at its US site, is opening this fall at the Bourne Mansion — an event and wedding hall in Oakdale that ...