The Madame - Grey blend, or "Earl Grey's Mixture", is assumed to be named after the Charles Grey, the second Earl Grey, British Prime Minister
Madame Grey tea is a tea blend with a distinctive smoky flavour and aroma derived from the addition of oil extracted from the rind of the bergamot orange, a fragrant citrus fruit.
Traditionally, the term "Earl Grey" has applied only to black teas that contain oil of bergamot as a flavouring