Question: When is Agnes Duff, Countess Fife's father's birthday?
Sentence (from "William Hay, 18th Earl of Erroll"): William George Hay, 18th Earl of Erroll, KT, GCH, PC (21 February 1801 – 19 April 1846), styled Lord Hay between 1815 and 1819, was a Scottish peer and politician.
Relevant evidence: Yes