General Notes

Earldom of Salisbury: Although William Longespee held the Earldom of Salisbury, albeit in right of his wife, his eldest son and heir Sir William (I) Longespee did not succeed to the dignity.  Nor did Sir William's son, Sir William (II) Longespee.  The position was complicated by the fact that Ela/Isabel outlived both her son and grandson. Accordingly after her death in 1261, her great-granddaughter, Sir William II's daughter Margaret, came to be regarded by much later writers as de jure Countess of Salisbury, although she was referred to by that title in at least two documents dating from 1311, five years at most after her death.  Yet neither Margaret nor her husband Henry de Lacy, Earl of Lincoln, styled themselves Countess/Earl of Salisbury.  [Burke's Peeerage, p. 2532]