Rita originates in Greek language and is a diminutive of Margarita or Margaret. Margaret is derived from the Greek word margarites, which means "pearl". One of the most famous bearers of this name is probably the former Conservative Prime Minister of the UK Margaret Thatcher, nicknamed the "Iron Lady". The name has become popular again recently after decrease in usage within the 20th century. The name Rita was probably popularized by the famous American actress Rita Hayworth.