The Finnish medical doctor Ylermi Luttinen (assisted by Teivas Oksala and Maija-Leena Kallela and Erkki Palmén) has translated several Tintin books into Latin. They cannot be properly published as the rights are prohibitively expensive, but he has kindly given me some copies. The ones I have are De loto Carulea (The Blue Lotus), 7 globi crystallini (The Seven Crystal Balls), Auris fracta (The Broken Ear), Cancer forficibus aureis (The Crab with the Golden Claws), and Templum solis (Prisoners of the Sun).
I found no character list, but here are the ones that I could locate (French name in parentheses when different):
- Tintin is Titinus.
- Snowy (Milou) is Milulus.
- Captain Haddock is Nauarchus.
- Professor Calculus (Tournesol) is Helianthus.
- Thomson and Thompson (Dupond et Dupont) are Clodius and Claudius.
- Rastapopoulos is Rastapopulus.
- Nestor is Nestor.
There are several named minor characters, but these are the central ones. Let me know if you would like a name of a character appearing in one of these stories, and I can try to find it.