Peletier de Rosanbo family is born with the marriage
between Geneviève de Coskaër de Rosanbo
and Louis Le Peletier in 1688.
Geneviève is the sole heiress of Rosanbo
lands, one of the largest estates in Britanny
; Louis is the son of Claude Le Peletier, former
Provost of the Merchants of Paris, successor to
Colbert as finance general controller and Minister
of State of King Louis XIV.
It marks the union of the Breton old race nobility
with the Parisian aristocraty of the members of
Parliament. King Louis XIV authorizes Louis to
take over the name of Rosanbo and to bear the
title of marquess. He will become First President
of the Parliament of Paris.
His grandson, Louis Le Peletier de Rosanbo,
marries Marie Claire de Mesgrigny d’Aunay,
granddaughter of Field Marshall de Vauban.
Their son, also named Louis, links his destiny
to Antoinette de Lamoignon de Malesherbes, daughter
of Malesherbes, King Louis XVI’s minister
and later on his lawyer during his revolutionary
The Rosanbo household will be decapitated in
1794 in the same carriage as Malesherbes as
well as their daughter Aline and her husband
Jean-Baptiste de Chateaubriand, brother of the
Their second daughter, Louise will marry Hervé
de Tocqueville, parents of the famous historian.
Their son Louis, survivor of the guillotine
thanks to his youth, will never come back to
His descendants will take again the torch.
Today, Alain, marquess of Rosanbo, perpetuates
the tradition. In 1958, he has opened the castle
to the public.
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