ISHVAH (ĭsh'va, Heb. yishwâh, he will level). The second son of Asher (Gen.46.17; 1Chr.7.30).

ISHVAH ĭsh’ və (יִשְׁוָ֛ה). KJV ISHUAH, ĭsh’-ōō ə (Gen 46:17), ISUAH, ĭs’ ōō ə (1 Chron 7:30). The second son of Asher; descended from Jacob and Zilpah (Gen 46:17; 1 Chron 7:30).

International Standard Bible Encyclopedia (1915)

Second son of Asher (Ge 46:17; 1Ch 7:30). As only the families of his brothers Ishvi, etc., are mentioned in Nu 26:44, the supposition is that he left no issue.