Can I have Mass said for someone (deceased) who was baptized Catholic as an infant but raised Protestant?
Fundamentally, any baptism utilizing the integral Trinitarian formula is a Catholic baptism, whether done in a Catholic Church or in some horror of a Protestant meeting house. Having a Mass said for them would be no different than having one said for the Baptist living down the street. Is it being done for sentimental reasons or because you have good reason to believe that they abjured their error before death? To me, I'd always be reluctant to raise the intention of a public heretic to the altar of God, especially one whose reformation is no longer possible.
You say that the person was "raised Protestant". Does that mean that they grew up in a household whose other members were Protestants and they abstained, or that they were actively Protestant until their death?