'Phags-pa script
It has been proposed, notably by Georg Bühler (1898), that the Brahmi script of India (and by extension the derived Indic alphabets) was ultimately derived from the Aramaic script, which would make Phoenician the ancestor of virtually every alphabetic writing system in use today, with the notable exception of written Korean (whose influence from the Brahmi-derived 'Phags-pa script has been theorized but acknowledged to be limited at best, and cannot be said to have derived from 'Phags-pa as 'Phags-pa derived from Tibetan and Tibetan from Brahmi).