Petronia rhymes with:
sophronia, adonia, amazonia, ansonia, antonia, caledonia, colonia, cydonia, diaphonia, donia, estonia, gastonia, gonia, harmonia, idonia, latonia, macedonia, madonia, new-caledonia, omonia, patagonia, philharmonia, rondonia, sidonia, sinfonia, slavonia, slovonia, sophronia, tonia, vernonia, vidonia
Petronia sounds like:
padron, paterno, patrimony, patron, patrone, patronym, pattern, peterman, petermann, petrin, petrina, petrini, petrino, petromin, petrone, petroni, petronio, phototron, putterman