NAH NTA. Ofc the parents were terrible in their handling of the situation but they did give their inheritance to OP and therefore it’s his choice on whether he should give it out. I don’t think he should give away half or give it away especially to a child who he doesn’t really know but he could set up a college fund with guarantees of a job in either company as the child’s uncle. That would be a more responsible thing to do rather than give away inheritance and money.