Abba Saliba

I'd follow up this disentanglement, to track down Abba Salîba of Ishoʿdnah #101-2. The firm-ish date we got is that Joseph Ḥazzaya lived during the Anni Hegirae. Another clue is Cyriacos, his master: Mar Cyprian metropolitan of Nisibin appointed him bishop over Balad.

That's of interest here because during the Islamic invasion, another Cyriacos was metropolitan. This Scrooge mac Duck was succeeded by... nobody, until pope Maremmeh promoted Isaac, from Arzun. Isaac outlives Marammeh after which he receives one of Ishoʿyahb's first letters as Ishoʿyahb III. Balad meanwhile has her own sequence of bishops. This means both cities are accounted for until, what, the AG 960s. Mar Cyprian is metro' after that and, er, where is he in Ishoʿyahb III's letters? or in the Khuzestan Chronicle? or in Siʿrt?

A decade or two later under the Suyfânid amirate (AG 971-94), the pope - George or John bar Marta, but probably George - appointed one John over Nisibis. In the ensuing fitna John will make a play for the Catholicate. That opens an annoying gap...

Luckily at this point we have Abû'l-Faraj Bar Hebraeus - witnessing from the other side. Also luckily EW Budge translated the first part of this to English. Cyprian was metropolitan in Nisibin during the days of Catholicos Jacob II, presiding over a rapprochement between the Had-Qnoma and the Eastern Church between Nisibis and Tikrit (no less). We're not so lucky to get the exact year from Budge but, from the Syriac, Chronicon Ecclesiasticum, ii. [v. 3] coll. 155, 157: 150 anno taeorum.

BACKUP 3/27: Sebastian Brock in 1971 made a collation: 10.1484/J.ABOL.4.02898. Although Cyriacos (understandably) and Isaac (for some reason) aren't recalled by everyone, the diptychs all agree next on (another?) George, then maybe on Sahduy, and agree again upon Qamishoʿ, then maybe-again Shembayteh and finally: Rozbihan then Cyprian. Barsauma and John are excluded.

Since Cyprian was already elderly by then, Cyriacos was born under the Marwânids. It's even less easy to constrain when Salîba built that monastery and adopted him. What I think has been shown is that all of this was long after Ishoʿyahb III migrated to the care (or judgement) of our Lord.