Who is Elund from The Reckoning and what is their importance?

Elund is Hugh de Witton's first wife. She is a Welsh beauty who Hugh desires to marry the first time he sees her. She is not intelligent or interesting, and the heated relationship soon grows cold. Under Welsh law, a woman can seek a divorce for a number of reasons and Elund leaves the marriage. Hugh, an Englishman, is astonished when she leaves, believing marriage is a lifetime bond. He mourns the loss of honor and what he believes to be the displeasure of God more than he mourns the loss of his wife.