Chaldean Catholic Archeparchy of Kirkuk-Sulaimaniya
The foundation of the Chaldean Catholic diocese of Kirkuk has been attributed to Yohannan VIII Hormizd, who was recognised by the Vatican as patriarchal administrator of the patriarch of Babylon in 1780 and, after five decades of disputes and confrontations, as patriarch in 1830. According to the Chaldean Catholic priest Joseph Tfinkdji, Yohannan Hormizd visited the town of Kirkuk in 1789 while travelling from Mosul to Baghdad, and converted its Church of the East community to Catholicism. He is said to have consecrated a Chaldean metropolitan for Kirkuk, Mar Abraham, who resided in Aïnqawa during his reign, and died between 1821 and 1824. The source for this assertion is not clear. Abraham is not mentioned by any other source, and as Yohannan Hormizd himself (then considered by the Vatican to be merely metropolitan of Mosul) is styled 'metropolitan of Kirkuk' in a colophon of 1798, the Kirkuk region would seem to have been part of the diocese of Mosul at this period.
Kalonymos family
Rapoport, Leopold Zunz, and many others place the settlement in 876, believing the King Charles, mentioned in the sources as having induced the Kalonymides to emigrate to Germany, to have been Charles the Bald, who was in Italy in that year; Luzzatto and others think that it took place under Charlemagne, alleging that the desire to attract scholars to the empire was more in keeping with the character of that monarch; still others assign it to the reign of Otto II, Holy Roman Emperor (973-983), whose life, according to the historian Thietmar von Merseburg, was saved in a battle with the Saracens by a Jew named Kalonymus. The following table, compiled from the accounts of Eleazar of Worms and Solomon Luria, gives the Italian and German heads of the family, which produced for nearly five centuries the most notable scholars of Germany and northern France, such as Samuel he-Hasid and his son Judah he-Hasid. Although all of them are mentioned as having been important scholars, the nature of the activity of only a few of them is known.