Italian word certezza comes from Italian certo, Italian ricco

Detailed word origin of certezza

Dictionary entry	Language	Definition
certo	Italian (ita)	(preposition) some, certain. Certain, sure. Reliable Certainly, of course, surely, definitely.
ricco	Italian (ita)	Rich - possessing money, beauty etc. (in the plural) the rich. Rich man.
certezza	Italian (ita)	Certainty, certitude. Conviction, confidence, assurance.

Words with the same origin as certezza