[3] The Russian orientalist Vladimir Minorsky considered the name "Beylagan" (most likely Bēl-ākān) to be connected to Baylaman (Bel-mān, "home of the Bel-s") in Gilan.

[4] He considered the name to be an indication that Beylagan had received Iranian settlers from mostly Gilan, as well as other areas south of the Caspian Sea.

[5] In the sixth century 'Paidangaran' (as its name is recorded in Syriac) was a diocese of the Assyrian Church of the East, two of whose bishops are known.

[6] During the Muslim conquests, Beylagan reportedly surrendered to the Arab commander Salman ibn Rabiah (died 650) without putting up any resistance.

Beylagan is mentioned by medieval geographers as a modest but thriving town, well-known for its cloth and a form of confectionery named nāṭef.

Its ruins are now known as Ören-kala and lie near Kabirli village, a 22 km drive from the modern city of Beylagan.