The name Ealdgyth (; sometimes modernized to Aldith, may refer to
Ealdgyth, daughter of Uhtred the Bold, Earl of Northumbria (died 1016) and Ælfgifu who is a daughter of Æthelred II Ealdgyth (floruit 1015–1016) (born c. 992), wife of Sigeferth and then of King Edmund Ironside Ealdgyth, wife of the thane Morcar (died 1015) Ealdgyth, daughter of Earl Ælfgar (fl. c. 1057 – 1066), wife of Gruffudd ap Llywelyn and later of Harold Godwineson Edith Swanneck (c. 1025 – c. 1086), concubine of Harold Godwineson Ealdgyth of Wallingford, daughter of Wigot and wife of Robert D'Oyly (died 1091)
See also Eadgyth (disambiguation), Old English form of the name (Edith) Eadgifu, sometimes Latinized as Ediva or Edgiva