For a brief period in the early 12th-century, the see of Connor was united with Down under Máel Máedóc Ua Morgair (Saint Malachy), who also was Archbishop of Armagh. On 29 July 1439, plans for a permanent union of the two sees were submitted to King Henry VI of England for his sanction. Exactly twelve months later, 29 July 1439, Pope Eugene IV issued a papal bull stating that Down and Connor were to be united on the death or resignation of either bishop.
In the early 12th-century, Connor and Down were temporarily united under Máel Máedóc Ua Morgair (Saint Malachy), who also served as Archbishop of Armagh. In 1439, plans for a permanent merger were submitted to King Henry VI of England, which was later confirmed by Pope Eugene IV.