Landry appears in the names of towns in France, Canada and the United States, as well as three canonized saints.
Landry: It was not until the early Middle Ages that surnames were introduced to distinguish between numbers of people bearing the same personal or Christian name.
Dictionaries of surnames indicate probable spelling variations of Landry to be: It appears, however, that it is not known for certain when the name was first recorded.
Rather it seems to have been concentrated around three small villages, south of the town of Loudon, province of Poitou: LaChausee, Martaize and Aulnay.
N. Bujold and M. Caillebeau, Les origines francaises des premieres familles acadiennes:le sud Loundais (Poitiers:Imprimeirie L'Union, 1979) p. 32