Question: When is George Stewart, 9Th Seigneur D'Aubigny's mother's birthday?
Sentence (from "Katherine Clifton, 2nd Baroness Clifton"): Katherine Clifton, 2nd Baroness Clifton (c. 1592 – buried 17 September 1637), was an English-born Scottish peer (later known as the Countess of March, then Duchess of Lennox and then Countess of Abercorn).
Relevant evidence: Yes