Susan Bertie (born 1554) was the daughter of Catherine Duchess of Suffolk, née Willoughby, by her second husband, Richard Bertie. Susan was the noblewoman memorialized by Lanyer at the beginning of the Salve Deus Rex Judaeorum (1611) as the "daughter of the Duchess of Suffolk." At sixteen years of age, she married Reginald Grey of Wrest, who was later restored as the fifth Earl of Kent. Widowed at age nineteen, Susan, now Dowager Countess of Kent, remarried to Sir John Wingfield in 1581 at age twenty-seven.