Louis Guillaume de Parscau du Plessix (Saint-Malo, 1725 — 1786) was a French Navy officer.

[3][4][5] Navy Minister Sartine had chosen her to be one of the six ships held ready for immediate departure at all times.

[1][8][9] He took part in the Battle of Martinique on 17 April 1780,[10] and in an expedition against British interests in Florida.

[11] On 22 July 1781, as the squadron was anchored at Cap français, a barrel of local rum caught fire, and Intrépide exploded.

[14] He took part in the Battle of the Chesapeake on 5 September 1781, as flag captain to Monteil, commander of the French rear.