In 1439, in the reign of Zara Yakub, a religious discussion between an Abyssinian, Abba Giorgis, and a Frank had led to the despatch of an embassy from Abyssinia to the Vatican; but the initiative in the Roman Catholic missions to Abyssinia was taken, not by Rome, but by Portugal, as an incident in the struggle with the Mussulmans for the command of the trade route to India by the Red Sea.
Abba bar Kahana, who was confused with a predecessor, Rab Kahana.
A leader appeared in the person of Mahommed Ahmed, born in 1848, who had taken up his abode on Abba Island, and, acquiring great reputation for sanctity, had actively fomented insurrection.
Abba and others; it is arranged according to the Mishnic orders and tractates, but lacks IV.
A few miles east and north respectively of Dajan are Mounts Bivat and Abba Jared, whose summits are a few feet only below that of Dajan.