It is argued that the reverse of the dodecanummium attributed to ‘Abd al-‘Azīz ibn Marwān, governor of Egypt from 685 to 705 CE, because of the Greek legend ΑΒΑΖ in the exergue, conceals the full legend ΑΒ ΑΖ ΙΒ MΑΡ, abbreviating his name in such a way as to place the attribution of the type to him beyond any doubt. In light of this, it seems preferable also to read the legend MΑSΑ on the reverse of another Arab-Byzantine dodecanummium in abbreviation of the name of Māslama ibn Mukḥallād ibn Samīt, governor of Egypt from 669 to 682.