Rav Mar Aba, son of Mar Rav Ami [(and in Yuchsin in the Order of the Kabbalah of the Rame"a: Rabbah son of Rav Assi; in my opinion this is a printing error referring to the above, year 4459)] and Rash"b wrote there that he was the grandson of Mar Shmuel, whom Shlomo son of Chasday, the Exilarch, elevated in Mata Mechasia] reigned in Pumbedita from the year 4629 for two years.