Perhaps you should try some spelling variations:
"Montcalm de Saint-Véran, Louis-Joseph, Marquis de," » "Montcalm de Saint-Véfran, Louis-Joseph, Marquis de,", "Montcalm de Saint-Véryan, Louis-Joseph, Marquis de,", "Montcalm de Saint-Vérank, Louis-Joseph, Marquis de,"
"Montcalm de Saint-Vérand, Louis-Joseph, Marquis de," » "Montcalm de Saint-Véfrand, Louis-Joseph, Marquis de,", "Montcalm de Saint-Véryand, Louis-Joseph, Marquis de,", "Montcalm de Saint-Vérankd, Louis-Joseph, Marquis de,", "Montcalm de Saint-Véland, Louis-Joseph, Marquis de,", "Montcalm de Saint-Véhand, Louis-Joseph, Marquis de,", "Montcalm de Saint-Véband, Louis-Joseph, Marquis de,"

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• Performing a fuzzy search may retrieve terms with similar spellings: (("Montcalm de Saint-Véran, Louis-Joseph, Marquis de,") OR ("Montcalm de Saint-Vérand, Louis-Joseph, Marquis de,"))~.
• The words AND, OR and NOT may confuse the search; try adding quotes: "((\"Montcalm de Saint-Véran, Louis-Joseph, Marquis de,\") OR (\"Montcalm de Saint-Vérand, Louis-Joseph, Marquis de,\"))".
• Removing quotes may allow a broader search: (( Montcalm de Saint-Véran, Louis-Joseph, Marquis de, ) OR ( Montcalm de Saint-Vérand, Louis-Joseph, Marquis de, )).
• Adding a wildcard symbol may retrieve word variants: (("Montcalm de Saint-Véran, Louis-Joseph, Marquis de,") OR ("Montcalm de Saint-Vérand, Louis-Joseph, Marquis de,"))*.