Hadar appears as the final king in Edom's pre-Israelite monarchy list in Genesis. The parallel passage in Chronicles reads 'Hadad,' and textual evidence (Septuagint, Samaritan, Syriac) supports Hadad as the original reading, with Hadar being an Aramaic-influenced variant. His capital was Pau, and his wife was Mehetabel, unusually identified by her mother's and grandmother's names. This genealogical notice preserves Edom's royal succession, fulfilling God's promise to Esau about kings coming from his line. The name variation illustrates how biblical texts sometimes show linguistic updating or dialectical differences.