Jean I de Dreux, Duc de Bretagne was born in 1217. He was the son of Pierre Mauclerc de Dreux, Duc de Bretagne and Alice de Thouars, Duchesse de Bretagne. He married Blanche de Navarre, daughter of Thibaut I (IV), Rey de Navarre.[1][2] He died in 1286.
Jean I de Dreux, Duc de Bretagne also went by the nick-name of Jean 'the Red'.[3] He was also known as Duc de Bretagne as of 1221.
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