Lord William Beauchamp Nevill was an English aristocrat who was born into the wealthy family of William Nevill, 1st Marquess of Abergavenny, grew up in Eridge Castle, and attended Eton College. His marriage to Mabel Murietta, daughter of an alleged mistress of Edward VII, Jesusa Murietta, was a glittering affair, attracting many royal and aristocratic guests and 600 wedding gifts. However Nevill lost much of his good fortune when his father wanted to reject him for converting to Catholicism and turning to trade, and the remainder of it when his wife's rich father's business failed soon after the wedding.