Gildis was a woman of the House of Hador (House of Marach). She was the wife of Hador Lórindol, the fifth Chieftain of the House of Marach (later known as "House of Hador" after her husband), and the mother of Glóredhel her only daughter and eldest child, Galdor her elder son and second child, and Gundor her youngest son and youngest child,