The sons of Asher: Imnah, and Ishvah, and Ishvi, and Beriah, and Serah their sister.
Such problems as these do not concern us.  The great purpose of the sacred author here was to forge a strong link between the pre-exilic and post-exilic Israels; and these remarkable genealogies certainly accomplished that very thing.  No doubt they were understood far more perfectly by the descendants of the twelve tribes than any one may understand them thousands of years later.