Fionn Myles Maryons O'Brien (1903-1977) (1903–1977) Parents Lucius O'Brien, 15th Baron Inchiquin Ethel Jane Foster Children Conor Myles John O'Brien, 18th Baron Inchiquin Fiona Jane O'Brien Siblings Griselda Etheldreda Clodagh O'Brien Katharine Beryl O'Brien Finola Helga Laetitia Monica O'Brien Phaedrig O'Brien, 17th Baron Inchiquin Donough O'Brien, 16th Baron Inchiquin Partners Josephine Reine Bembaron