I have no idea what I'd do in that situation.
I can say that I was totally planning to always keep my own last name, cause it's all but dead and I wanted to give it some chance to survive, and all my degrees and stuff are in that name. And I love my initials "CNT"
However, now that I'm with my bf, if we end up together I'm totally excited to take his last name cause it's Indian, and I think that would be awesome.
I can't imagine people being hurt over changing a name. If his grandfather changed his name to better his career, why would his father think so ill of him changing his name. He's just following in the family footsteps.