Darlessa Marbrand was married to Ser Tygett Lannister. Ser Tygett was the second brother of Lord Tywin Lannister. Darlessa was left a widow when Ser Tygett died of a pox. Her son Tyrek was a squire to King Robert I Baratheon until Robert's death. She is the mother-in-law or "good mother" to Lady Ermesande Hayford. Her son was married to the infant Ermesande in order to claim her lands. Sadly, Tyrek vanished during the riot following Princess Myrcella's procession to the dock to leave for Dorne.

Darlessa's relationship to Ser Addam Marbrand is unknown. Ashmark was the former strong of House Marbrand.