Hi Johnny_Doyle,
Many thanks for the newspaper clipping. William and his father Edward F Hussey were both supposedly quite high up in the RIC, but I haven't had a chance to check Irish newspaper archives as yet.
Although I need to get Dudley's marriage cert to confirm, I'm 99% sure William was Dudley's brother. I transcribed a birth entry for William from the Castlrea (Co. Roscommon) COI records. In fact, I transcribed entries for the entire family, except.... you've probably guessed it - Dudley...
You'll have noticed an Ethel Maud Hussey on William's census returns - the only Ethel Hussey in either 1901/1911 census. Conveniently, she also turned up on the Ulster Covenant... with her address given as Rathmullan

Coincidence?
Given that Dudley DVH Hussey doesn't appear in Civil Index births or deaths, or in either census, (or in Castlerea COI records for that matter), I wondered if perhaps Dudley was not his given name. I'm at a loss to be honest!
Any thoughts???

Simon