Fenessey, O'Fennessy, Litany, Littany, Lyden, Lydan, Leyden, Finnessy, Finnessy and many more. First found in Liddane, where they held a family seat as Chiefs in Tipperary . Irish history was greatly influenced by the Norman invasion of 1172, and thereafter, the surnames of Irish Gaelic clanns and septs and many of