= Aelius Dionysius epsilon60, Etymologicum Genuinum s.v. Also basically = Photius, Lexicon epsilon1756, and Etymologicum Magnum 366.11, though Photius gives the final part as follows th\n de\ e)pithqh\n, th=s tou= patro\s mhte/ra kai\ th=s mhtro\s mhte/ra (with the first mhte/ra being obelized as corrupt by Theodoridis); and Gaisford's text of the Etym.Magn. entry has th\n de\ e)pithqh\n, th=s tou= patro\s mhte/ros kai\ th=s mhtro\s mhte/ra. Of these, the Etym.Magn. text seems the most legible and logical, and is the basis for the suppletions in the translation above. Yet the odd deployment of definite articles and the use of the rarer genitive form mhte/ros in close proximity to the canonical mhtro/s leaves one suspicious. Meier (1863: 121) suggested emending to mhtro/s. Part of the confusion may stem from the fact that these kinship terms can be highly fluid, and the headword is attested as meaning great-great-grandmother as well (Compare Pollux 3.18, and LSJ s.v. at web address 1). Nauck (1963: 142 n.35) tentatively attributed some of this to Aristophanes of Byzantium, but see the comments of Slater in Nauck-Slater (1986: 74-5).
[1] For th/qh, grandmother, see tau 472.
[2] Isaeus fr. 35 Sauppe.