Brian Colman O'Riordan BDS FDS FFD DDR: Specialist in Maxillofacial Surgery and Dental Radiology, ballet dancer, horse brass collector and Freeman of the City of London.

Brian O'Riordan was an Irish dentist who made his name in maxillofacial radiology after further training in England, where he then lived and practiced. He was very involved in efforts to raise the status of that branch of the profession, including development of a Diploma in Dental Radiology establishment of the European Academy of Dentomaxillofacial Radiology. Outside of dentistry, at various times he was a ballet dancer and collected horse brasses.