Thomas, 2nd Earl of Lancaster (c. 1278 – 22 March 1322) was an English nobleman of the first House of Lancaster, a cadet branch of the royal Plantagenet dynasty. He held the titles of Earl of Lancaster, Leicester, and Derby from 1296 until his death in 1322, and also those of Earl of Lincoln and Salisbury jure uxoris from 1311 to 1322. As one of the most powerful barons in England, Thomas became a leading figure in the baronial opposition to his first cousin, King Edward II.
Ela of Salisbury, 3rd Countess of Salisbury (1187 – 24 August 1261) was an English peeress. She succeeded to the title in her own right in 1196 upon the death of her father, William FitzPatrick, 2nd Earl of Salisbury.
Ela married William Longespée, an illegitimate half-brother of kings Richard I and John, who thus became Earl of Salisbury, in 1196. Ela held the post of High Sheriff of Wiltshire for two years after William's death, then became a nun, and eventually Abbess of Lacock Abbey in Wiltshire, which she had founded in 1229.