ZILPAH

zil'-pa (zilpah, meaning uncertain; Zelpha): The ancestress of Gad and Asher (Genesis 30:10,12; 35:26; 46:18), a slave girl of Leah's, given her by Laban (Genesis 29:24; 30:9). In Ezekiel 48 the Zilpah tribes have the Ezekiel 5th division toward the South of Palestine and the Ezekiel 6th to the North, a slightly more favorable position than that of the Bilhah tribes.

From the International Standard Bible Encyclopedia
Edited by James Orr, published in 1939 by Wm. B. Eerdmans Publishing Co.