This personal name appears in the genealogies of Judah, specifically within Caleb's extended family line. The text's syntax creates some ambiguity about whether Yahdai was a son or more distant descendant. The name's meaning is uncertain, though some suggest it means 'Yah leads' or forms a shortened theophoric construction. Like many names in Chronicles' genealogies, no narrative develops around this individual beyond the genealogical notation.