Kingdom of Desmond
Another family surnamed Ó hAonghusa were found at Ros Ailithir, in the Kingdom of Desmond. It is from this family that the founder of Hennessy brandy, Richard Hennessy of Killavulen, by Mallow, and Cognac (1720–1800), descended. Richard's descendants, Maurice Hennessy and his cousin Kilian Hennessy (1907–2010), were business magnates and patriarchs of the Hennessy cognac company.