Grimaldo rhymes with:
aldo, ansaldo, arnaldo, baldo, capaldo, castaldo, cataldo, donaldo, faldo, geraldo, giraldo, naldo, reinaldo, renaldo, reynaldo, rinaldo, waldo
Grimaldo sounds like:
greenawalt, greenwald, greenwalt, grimaldi, grinald, groenewold, gronewold, gruenewald, gruenwald, grunewald, grunwald