Katherine St Quintin (c.1607 - c.1700); third wife of Alexander Montgomerie, 8th Earl of Eglinton (1607–1700) Parents Sir William St Quintin, 1st Baronet Mary Lacy Children Siblings Dorothy St Quintin Frances St Quintin Sir Henry St Quintin, 2nd Baronet Partners Michael Wentworth Sir John Kaye, 1st Baronet Henry Sandys Alexander Montgomerie, 8th Earl of Eglinton