Fiona Jane O'Brien (born 1941) (b. 1941) Parents Fionn Myles Maryons O'Brien Josephine Reine Bembaron Children Isabelle Stephanie Marie Joseph Ghislain Obert de Thieusies Sophie Patricia Marie Joseph Ghislain Obert de Thieusies Patrick Conor Alain Marie Joseph Ghislain Obert de Thieusies Siblings Conor Myles John O'Brien, 18th Baron Inchiquin Partners Romano Louis Marie Joseph Ghislain Obert de Thieusies