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King Arthur's family grew throughout the centuries with King Arthur's legend. The earliest Welsh Arthurian tradition portrays Arthur as having an extensive family network, including his parents Uther Pendragon and Eigyr (Igraine), wife Gwenhwyfar (Guinevere), nephew Gwalchmei (Gawain), brother, and several sons; his maternal lineage is also detailed, linking him to relatives like his grandfather. This complex familial structure is simplified in the shared British and greater European (notably French) tradition of chronicles and medieval romances influenced by Geoffrey of Monmouth's writings, which instead introduce new characters like Arthur's half-sisters including Morgan and Morgause, theirs children including Yvain and Mordred, and others. Arthur's lineage was later claimed by various rulers, especially the House of Tudor and Scottish clans, reflecting the enduring legacy of his familial ties in medieval and early modern genealogies.