Sir David Edmond O'Brien, 6th Bt. (1902-1982) (1902–1982) Parents Audrey Townsend Crawford Edmond Lyons O'Brien Children John David O'Brien Gerald Patrick O'Brien Audrey Mary O'Brien Siblings Edmond Robert Richard O'Brien Audrey Mary Elizabeth O'Brien Sir John O'Brien, 5th Bt. Partners Mary Alice Grey