William Johnston1
He graduated with a Doctor of Medicine (M.D.)1 He was Professor of Mathematics between 1626 and 1640 at University of Aberdeen, Aberdeen, Aberdeenshire, ScotlandG.1
unknown Turing of Foveran1
Child of unknown Turing of Foveran
Janet Turing1
Her married name became Johnston.
Child of Janet Turing and John Johnston of Caskieben
Sir George Johnston of Caskieben, 1st Bt.1
He was created 1st Baronet Johnston, of Caskieben [Nova Scotia] on 31 March 1626, with special remainder to his heirs male whatsoever.1 He held the office of Sheriff of Aberdeenshire in 1630.1
Children of Sir George Johnston of Caskieben, 1st Bt. and Elizabeth Forbes
- Sir George Johnston of Caskieben, 2nd Bt.+2 d. b 10 Jun 1695
- John Johnston+2
William Forbes of Tolquhoun1
Child of William Forbes of Tolquhoun
Elizabeth Forbes1
Her married name became Johnston.
Children of Elizabeth Forbes and Sir George Johnston of Caskieben, 1st Bt.
- Sir George Johnston of Caskieben, 2nd Bt.+2 d. b 10 Jun 1695
- John Johnston+2
Sir George Johnston of Caskieben, 2nd Bt.1 
He succeeded as the 2nd Baronet Johnston, of Caskieben [N.S., 1626].1 He sold Caskieben to Sir John Keith, who changed the name to Keith Hall in 1660.1
Child of Sir George Johnston of Caskieben, 2nd Bt. and unknown daughter Leslie
- Sir John Johnston of Caskieben, 3rd Bt.2 b. c 1648, d. 23 Dec 1690
Sir William Leslie of Wardis, 3rd Bt.1
Child of Sir William Leslie of Wardis, 3rd Bt.
unknown daughter Leslie1
From before 1648, her married name became Johnston.
Child of unknown daughter Leslie and Sir George Johnston of Caskieben, 2nd Bt.
- Sir John Johnston of Caskieben, 3rd Bt.2 b. c 1648, d. 23 Dec 1690
Sir John Johnston of Caskieben, 3rd Bt.1 
Once when in London he helped a friend Captain Hon. James Campbell (brother of 1st Duke of Argyll) to elope with and marry Mary Wharton, a 13–year old heiress, daughter of Sir Thomas Wharton and great-niece of the 4th Baron Wharton.1 In 1688 He was a leading Whig and as one of the first to declare for King William III as a person of considerable influence. As a result he was tried and condemned to death.1 He fought in the Flanders War of Grand Alliance between 1688 and 1697, or League of Augsburg.1 He fought in the Battle of the Boyne in 1690, as a Captain.1 He succeeded as the 3rd Baronet Johnston, of Caskieben [N.S., 1626] before 23 December 1690.1
