Middle English word porche comes from Old French porte (Door.), Old French porche (Porch (decorated or ornate entrance to a building).)

Detailed word origin of porche

Dictionary entry	Language	Definition
porte	Old French (fro)	Door.
porche	Old French (fro)	Porch (decorated or ornate entrance to a building).
porta	Latin (lat)	(figuratively) way, means. Entrance, passage, door. Gate, especially of a city.
porticus	Latin (lat)	Colonnade, arcade. Portico.
porche	Middle English (enm)

Words with the same origin as porche