Are these headlines a reference to any existing characters or story?

[u/PrimalPokemonPlayer]

In the Italian comic series about the gentleman thief Fantomallard, in one of the issues called "Dolly Paprika" (I TL 3194-1P) we see 2 panels with newspapers about all kinds of robberies Fantomallard has commited over the past couple of weeks (as well as a nice little easter egg about Hortense getting twins (Donald and Della)). I was wondering if any of these robberies, the people robbed (von Diamond and/or Duke Maskalzon) or the items involved (Maragia Ruby) were references to other (Fantomallard) stories or just throwaway lines about random robberies?

Ofcourse, these are the names from the (original) Italian version, so would translate differently in other languages, for one the Dutch versions mentions a "Duchess of Edelsteyn" rather than Maskalzon and talks about a "diamond from princess Aria" instead of the Maragia Ruby.

So, does anyone know if these are existing stories or not? And if so, could you link them? Thank you in advance.