Hy-Amhalgaidh, now the barony of Tirawley, in the county of Mayo, still called in Irish Tir Amhalgaidh, i. e. the land or territory of Amhalgaidh. It derived that name from Amhalgaidh, King of Connaught, the brother of the monarch Dathi — See list of the Kings of Connaught further on, and Ussher's Primordia, p. 864, also O'Flaherty's Ogygia, Part III. c. 87.