Groseilliers, Médard Chouart, sieur des

Groseilliers, Médard Chouart, sieur des

(mādär` shwär syör dā grôsāyā`), 1618?–c.1690, French trader and explorer in North America. He was the brother-in-law of Pierre Esprit RadissonRadisson, Pierre Esprit
, c.1632–1710, French explorer and fur trader in North America. He arrived in Canada in 1651. His journals, first published as the Voyages of Peter Esprit Radisson
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 and his companion in his great journeys.