Agnes de Poitou was from the noble house of the de Poitou. She was born in 1020 to Comte, Duc Guillaume III de Poitou de Aquitaine and his wife Agnes de Bourgogne.
... da Gama, (1469?-1524), first to reach India from Europe by the sea route
Thomas Gann[?], explorer
Pierre Gaultier de Varennes et de la Vérendrye, (1685-1749), ...