Elizabeth, either approach is acceptable. As Terry said, a merge is easy to do since you are the profile manager of both profiles. Merging creates a "redirect," so that there is an extra nanosecond in searching for the end-result profile, so re-using the duplicate profile for someone with the same surname might be a better choice for the efficiency of searches. The issue of redirects is only a problem when there have been multiple merges of a profile, so hey, pick a option and go with it!