In general for conflated profiles:
1. Determine which person it would be easier to dedicate the profile to.
2. Propose - eg by public comment on the profile - that (a) the profile be dedicated to that person (Person A) and (b) you will create a profile for the other person (Person B).
3. If people agree or don't object within one week, go ahead and, first, create a new profile for Person B and, then, revise the original profile so that it is dedicated to Person A.
4. Make sure that (a) the parents, spouses and children on the original profile are connected to the correct profile and (b) that any links to the original profile in the profiles for the parents, spouses and children of the original profile are connected to the correct profile.