Dermod O'Brien Irish artist (1865-1945) (1865–1945) Parents Mary Spring Rice Edward William O'Brien Children Brigid Ganly Brendan Edward O'Brien Mary Elinor O'Brien David Lucius O'Brien Horace Donough O'Brien Siblings Lucy Cane Nelly O'Brien Lucy Mary O'Brien Ellen Lucy O'Brien Edward Conor Marshall O'Brien Margaret Ernestine O'Brien Katharine Jenny O'Brien Aubrey Ulick Marshall O'Brien Partners Mabel Emmeline Smyly