'Anjou-related' originates from French, specifically the word 'Anjou', where the place-name referred to the historical province and its ruling house.

'Anjou' in English came from Old French 'Anju' (modern French 'Anjou'), which itself was derived from Medieval Latin 'Andegavia' (from the Gallic tribe name 'Andecavi'); the compound 'Anjou-related' is a modern English adjectival formation combining 'Anjou' + 'related'.

Initially 'Anjou' designated a geographic territory and the people/rulers associated with it; over time derivatives such as 'Anjou-related' have come to mean anything pertaining to that region, its dynasty, or items (e.g., pears) associated with the name.