The Castle of Cagliostro
The character Arsène Lupin III, protagonist of the Japanese manga "Lupin III" beginning in 1967, was written as the grandson of Arsène Lupin but without permission from Leblanc's estate. This was later the source of a lawsuit though the copyright on Leblanc's work has since expired. When the anime version was broadcast in France, the character was renamed "Edgar, le détective cambrioleur" ("Edgar, the Burglar Detective"). The authors of the various "Lupin III" properties drew on Leblanc's novels as inspiration; notably, the film "The Castle of Cagliostro" was loosely based on "La Comtesse de Cagliostro" ("The Countess of Cagliostro").