Once they’ve been dead for a hundred years, it’s fine. They moved onto the next phase of their existence in the universe a long time ago.

Yeah, this is the impression I have as a generality, but I don’t know for sure the specific cultural practices relevant to this man, so I threw it in there to play it safe. It doesn’t cost anything, and I figure it’s a good idea to get into the habit of doing it. At very least one user (Tar_Alcaran) learnt something!