Jamieson, Fausset and Brown on 1 Chronicles 8:8

8. Shaharaim begat children in the country of Moab--He had probably been driven to take refuge in that foreign land on the same calamitous occasion that forced Elimelech to emigrate thither (Ru 1:1). But, destitute of natural affection, he forsook or divorced his two wives, and in the land of his sojourn married a third, by whom he had several sons. But there is another explanation given of the conduct of this Benjamite polygamist. His children by Hushim are mentioned (1Ch 8:11), while his other wife is unnoticed. Hence it has been thought probable that it is Baara who is mentioned under the name of Hodesh, so called because her husband, after long desertion, returned and cohabited with her as before.