From BiblePortal Wikipedia

Hastings' Dictionary of the Bible [1]

Jemnaan ( Jdt 2:28 ). See Jabneel.

International Standard Bible Encyclopedia [2]

jem´nā̇ - an ( Ἰεμνάαν , Iemnáan ): A city on the coast of Palestine; mentioned among those affected by the expedition of HolofernesJudith 2:28;  3:1 ff). The name is used for Jabniel, generally called "Jamnia" by the Greek writers.

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [3]

( Ι᾿Εμναάν , Vulg. omits), a place mentioned in the Apocrypha ( Judith 2:20) among those on the sea coast of Palestine to which the panic of the incursion of Holofernes extended, no doubt JABNEEL (See Jabneel) or JAMNIA (See Jamnia) (q.v.).