His elder brother Thomas Westropp Bennett was a Senator and Cathaoirleach of the Irish Free State Senate as well as serving in the Board of the Irish Agricultural Organisation Society (IAOS) for many years with Sir Horace Plunkett.
Thomas Westropp Bennett, his elder sibling, held positions in the Irish Free State Senate and served on the Board of the Irish Agricultural Organisation Society (IAOS) alongside Sir Horace Plunkett for many years.