From BiblePortal Wikipedia

Fausset's Bible Dictionary [1]

 Jeremiah 31:39. Named with the hill Garth. From Gaah , "to low" as a cow, "the heifer's pool" (Targum). But Syriac version, "to the eminence," from Gawah "to lose one's breath," namely, with ascending. S.W. outside the city of David, as Gareb was N.W. (Junius, in Poli Synopsis). Rather N.W. (Fergusson) (See Jerusalem .)

Morrish Bible Dictionary [2]

Place mentioned as one of the boundaries to which the city of Jerusalem will extend when it is rebuilt 'to the Lord.'  Jeremiah 31:39 . Not identified.

Holman Bible Dictionary [3]

 Jeremiah 31:39Goah

Easton's Bible Dictionary [4]

 Jeremiah 31:39

Cyclopedia of Biblical, Theological and Ecclesiastical Literature [5]

(or, rather, GOAH', גֹּעָה , a Lowing; the final ח being local in גֹּעָתָה , "to Goath," Sept. Ἐξ Ἐκλεκτῶμ Λίθων ; Vulg. Goatha), a place in the vicinity of Jerusalem, mentioned only in  Jeremiah 31:39 as lying beyond "the hill Gareb," in the compass of the city from between thee corner-tower (on the north-west) and the valley of Tophet (on the south); hence, perhaps, some eminence on the western bank of the valley of Gihon. (See Jerusalem). In accordance with the etymology is the rendering of the Targum, which has for Goah בְּרֵיבִת עֶגְלָא = the heifer's pool. The Syriac, on the other hand, has leromto, "to the emisesce," perhaps reading גֹּאָה (F Ü rst Handwb. page 269b). Barclay (City Of Great King , page 118) essentially agrees with the above location, although he seeks to identify the name with Golgotha (page 78), which is forbidden by the presence of the ע in Goah, and other philological considerations. (See Golgotha).