A Marilyn is a hill in the British Isles that has at least 150 m (492 feet) of relative height (you cannot get to the top from any other Marilyn without at least 150 m (492 feet) of uphill travel). The name, coined by writer Alan Dawson, is a pun ("Munro" — "Marilyn Monroe" — "Marilyn"). This category covers the Marilyns of Wales.