Ephah
Gloom. (1.) One of the five sons of Midian, and grandson of Abraham (Gen 25:4). The city of Ephah, to which he gave his name, is mentioned Isa 60:6, Isa 60:7. This city, with its surrounding territory, formed part of Midian, on the east shore of the Dead Sea. It abounded in dromedaries and camels (Judg 6:5).
(2.) 1 Chr 2:46, a concubine of Caleb.
(3.) 1 Chr 2:47, a descendant of Judah.
Ephah, a word of Egyptian origin, meaning measure; a grain measure containing “three seahs or ten omers,” and equivalent to the bath for liquids (Ex 16:36; 1 Sam 17:17; Zech 5:6). The double ephah in Prov 20:10 (marg., “an ephah and an ephah”), Deut 25:14, means two ephahs, the one false and the other just.
From Easton’s Bible Dictionary (1897), by Matthew George Easton.