Dumah in Fausset's Bible Dictionary

("silence".) An Ishmaelite tribe and region (Genesis 25:14; 1 Chronicles 1:30; Isaiah 21:11). The name survives in Doomat el Jendel, "Dumah of the blocks of stone," namely, of which it was built. On the borders of Arabia and the Syrian desert. Put for all Idumea, to imply it should soon be put to silence, i.e. be destroyed. The name indicates its unhewn cyclopean masonry, like the gigantic buildings of Bashan. A town in the hills of Judah, near Hebron (Joshua 15:52). Perhaps now Duweimeh, on the W. of the high district, N. of the Negeb or dry south land.