Acheloias
Could not find Acheloiadumque in Logeion dictionaries.
Acheloiadumque Proper-name noun: feminine genitive plural of Acheloias
Ăchĕlōĭăs, ădis, patron. f. [Achelous],
- daughter of Achelous; hence (plur.), the Sirens, Ov. M. 14, 87: Parthenope, Sil. 12, 34; cf. the follg. art.
Ăchĕlōĭas, ădis, f. , Sil. 12, 33, et Ăchĕlōis, ĭdis, f. , Achéloïde [fille dʼAchéloüs] || au pl., les Achéloïdes, les Sirènes : Ov. M. 5, 552.