4 occurrences in 4 dictionaries
Reference: Ithream
Fausets
Sixth son of David; by Eglah, whom Jewish tradition identifies with Mirhal (since she is emphatically designated "David's wife"), adding that she died at Ithream's birth (2Sa 3:5).
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Hastings
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Smith
Ith're-am
(abundance of people), son of David, born to him in Hebron, and distinctly specified as the sixth, and as the child of Eglah, David's wife.