Original: Elizabeth Hay, Countess of Erroll (17 January 1801   16 January 1856; born Elizabeth FitzClarence) was the illegitimate daughter of William IV and Dorothea Jordan and married to William Hay on December 4, 1820  at age 19.
Simplified: Elizabeth Hay, Countess of Erroll (17 January 1801 – 16 January 1856), an illegitimate daughter of William IV and Dorothy Jordan, married William Hay on 4 December, 1820, at the age of 19.