John Gill Commentary 1 Chronicles 7:30

"The sons of Asher: Imnah, and Ishvah, and Ishvi, and Beriah, and Serah their sister." — 1 Chronicles 7:30 (ASV)

Ver. 30,31. The son of Asher
Which, and his two grandsons born before Jacob went down to Egypt, are here reckoned as in (Genesis 46:17) only it is here added Malchiel his second grandson,

who is the father of Birzavith ;
which Jarchi interprets, prince of a city of this name, which signifies pure oil; which it might have from the abundance of olives about it, Asher being a tribe which abounded with them, see (Deuteronomy 33:24) though some of the Rabbins take it to be the name of a man, whose daughters, they say, as Jarchi observes, were very beautiful, having much oil to anoint with, and were married to kings and priests anointed with oil.