Ussher's younger and only surviving brother, Ambrose, became a distinguished scholar of Arabic and Hebrew. According to his chaplain and biographer, Nicholas Bernard, the elder brother was taught to read by two blind, spinster aunts. A gifted polyglot, he entered Dublin Free School and then the newly founded (1591) Trinity College Dublin on 9 January 1594, at the age of thirteen (not an unusual age at the time). He had received his Bachelor of Arts degree by 1598 and was a fellow and MA by 1600 (though Bernard claims he did not gain his MA till 1601). In May 1602, he was ordained in the Trinity College Chapel as a deacon in the Protestant, established, Church of Ireland (and possibly priest on the same day) by his uncle Henry Ussher, the Archbishop of Armagh and Primate of All Ireland.