Italian word eminenza comes from Latin emineo, and later Latin eminentia (Eminence, excellence. Prominence, protuberance.)

Detailed word origin of eminenza

Dictionary entry	Language	Definition
emineo	Latin (lat)	(figuratively) I am or become conspicuous or prominent, stand out (through my good qualities); I am eminent, excel.. (of elements in a painting) I am prominent, stand out in relief.. I stand out, project, protrude.
eminentia	Latin (lat)	Eminence, excellence. Prominence, protuberance.
eminenza	Italian (ita)	Distinction, eminence, preeminence.