I'm noticing two common causes of conflicts now that many of the others have gone are

• hypens in names
• letters with acutes etc e.g 'Noël' vs 'Noel'

Between these 2 links we should be able to deal with them..
http://stackoverflow.com/questions/27680624/compare-two-string-and-ignore-but-not-replace-accents-php
http://stackoverflow.com/questions/24504331/how-to-compare-two-strings-case-and-diacritic-insensitive