William Hay, 18th Earl of Erroll British Earl (1801-1846) (1801–1846) Parents Alicia Eliot William Hay, 17th Earl of Erroll Children Alice Hay Agnes Duff, Countess Fife Ida Hay William Hay, 19th Earl of Erroll Siblings Lady Harriet Hay Lady Emma Hay James Hay, Lord Hay Samuel Hay Lady Caroline Hay Lady Isabella Hay Lady Dulcibella Hay Lady Fanny Hay Lady Margaret Hay Somerville Hay Partners Elizabeth Hay, Countess of Erroll