Lewis & Short

Ālecto, ūs, f., = Ἀληκτώ, οῦς (found only in nom. and acc.), the name of one of the three furies, Verg. A. 7, 341: Alecto torvam faciem Exuit, id. ib. 7, 415: luctificam Alecto ciet, id. ib. 7, 324.