That's actually what they used to do in the old days. All the saints, kings, politicians, etc would be localized, eg croatian count Josip Jelačić is József Jelasics in hungarian or Joseph Jellachich in german, Franz Ferdinand is Franjo Ferdinand in croatian, etc
Latvia does this today.
And you guys have Spinoza, though you don’t commonly netherlandize names much these days. But it’s neat.
We do for city names. Paris = Parijs, Londen = London, Berlijn = Berlin, Warschau = Warsawa etc.