Latin word protestor comes from Latin testor (I am witness, testify, attest.. I make a will.), Latin pro

Detailed word origin of protestor

Dictionary entry	Language	Definition
testor	Latin (lat)	I am witness, testify, attest.. I make a will.
pro	Latin (lat)	About. According to. As befitting. As, like. Before. For. In front, instead of. On behalf of.
protestari	Latin (lat)