Original: Elizabeth Hay, Countess of Erroll (17 January 1801 - 16 January 1856; born Elizabeth FitzClarence) was the illegitimate daughter of King William IV of the United Kingdom and Dorothea Jordan. She married William Hay, 18th Earl of Erroll, and became Countess of Erroll on 4 December 1820 at age 19.
Simplified: Elizabeth Hay, Countess of Erroll (17 January 1801 â "16 January 1856), an illegitimate daughter of William IV and Dorothy Jordan, married William Hay on 4 December, 1820, at the age of 19.