Depends on the dog and the situation they came from.
From an abusive situation, name they had whilst there, I might well change it.
From a shelter, had that name only a matter of weeks and has no real positive association to it, yep, I'd change it.
Older dog from a loving home, responsive to the name and no negative associations, I would probably keep it unless i REALLLLLLLLLLY hated it and then I'd change it to something v similar but thats more my sentimentality rather than the dogs needs.
So I had a dog called Gabi, from a very abusive set up, she'd flinch on hearing the hard 'Ga' start to her name, so we dropped the G and she was Abi and that worked out just fine.
If the whole name had made her tense up (I had a Molly who did!) then change it totally.
Names are really only a word that means 'hey you, pay attention' and they SHOULD mean 'the next thing that happens involves you and it'll be lovely..' but for some dogs it doesn't mean that, it means 'oh shit, trouble' or even 'blah blah white noise do as you please'.
Change if it you want, as long as you build the right association with it, the dog won't care