ἐφ' ὅσον αὐτοῦ ἡ ὑπόστασις τῶν χρόνων ὑπῆρχεν → as long as his store of years lasted
Cōphēn, ēnis, m. (Κωφήν), affluent de l’Indus : Mela 3, 69.