These are various different fashion designer brand identities that I have found on Behance:
https://www.behance.net/gallery/Fashion-Designer-Branding-Concept/8491149
https://www.behance.net/gallery/Cristina-Azpurua-Fashion-Designer-Branding/14464841
https://www.behance.net/gallery/Corporate-Design-Portfolio-Faina-Willenig/12852143