My father-in-law's home town in the western part of Lazio (central italy) had a christmas soup that was traditional there, and is probably very similar to your "wedding soup". They used what do they call them, cardons? Cardoons? these distant relatives of artichoke, that have large stalklike leaves with pointy edges - all stalk, hardly any leaf - and you have to clean them by peeling off the tissue-like covering, and cleaning off all the leafy parts and pointy parts. Then dice it up.
Chicken broth, i don't remember if the cardoons are boiled first or cooked in the broth, then the meatballs. Served on top of toasted artisanal bread with plenty of pecorino grated on top.
This is called zuppa alla sante'
My mother's family made an escarole soup that was similar - I make a very simple version for everyday use (boil together cut up escarole, sliced or chopped onion, celery, carrot in water, with salt and black pepper. Boil rice separately. Serve together (i keep the cold leftover rice in the fridge, separate from the soup, and enjoy it for several days - heat the soup, put in the cold rice and it comes to the right temp) - lots of parmigiano grated on top - in fact, a nice addition is a crust of the parmigiano cooked in with the soup - i love when it gets soft and rubbery and i eat it in the soup. This one is a real staple for me - when i'm alone i'll eat it every night for the week, and it's satisfying and healthy and really enjoyable.
It can be dressed up by using chicken stock instead of water, and meatballs.
Not sure if either of these are "wedding soup"