Elizabeth Ruth Naomi Belville (5 March 1854 – 7 December 1943), also known as the Greenwich Time Lady, was a businesswoman from London. She, her mother Maria Elizabeth, and her father John Henry, sold people the time. This was done by setting a Belvilles' watch to Greenwich Mean Time, as shown by the Greenwich clock, each day and then "selling" people the time by letting them look at the watch and adjust theirs.