This is Jean Marc François Colonna d'Ornano, grandson of François' brother Alexandre:
http://www.ordredelaliberation.fr/fr_compagnon/229.html
He was a French war hero, who died in battle against the Italians in WW2.
A road in Algiers was named after him; this video clip shows the plaque being unveiled:
http://www.ina.fr/video/AFE00002986
There's also a road in Paris named after him, and he's featured on postage stamps.
More about him here (in English):
http://books.google.co.uk/books?id=5...ano%22&f=false
http://books.google.co.uk/books?id=B...ano%22&f=false
He sounds like a sort of French Lawrence of Arabia.