#1 Donough O'Brien, the author of Donough O'Brien's Little Book of Banana Skins, is of Irish descent and works in advertising in London. From the family of Dromoland Castle (Barons Inchiquin), he is therefore related to
#2 The Hon. Donough O'Brien 1979-, author of Miniatures in the XVIIIth and XIXth Centuries.
#3 Donough O'Brien 1923- is the author of Laboratory manual of pediatric microbiochemical techniques.