David Lindsay, 1st Duke of Montrose
David Lindsay, 1st Duke of Montrose (144025 December 1495) was a Scottish nobleman.
He was the son of Alexander Lindsay, 4th Earl of Crawford, and inherited the Earldom of Crawford on his father's death in 1453.
During his political career he held the posts of Lord High Admiral of Scotland, Master of the Royal Household, Great Chamberlain and Justiciar.
He went frequently as an ambassador to England.
In 1488 he was created Duke of Montrose, the first Scotsman not of royal blood to be granted a Dukedom.
Lindsay had won the favour of James III, by remaining loyal to the king during the rebellion of his son Prince James.
Lindsay was deprived of his dukedom by James IV when he acceded to the throne later that year, but it was restored in 1489 for life only.
On his death in 1495 the title therefore became extinct, although the Earldom continues to this day.
He married Elizabeth Hamilton, daughter of James Hamilton, 1st Lord Hamilton in 1459.
They had three children before divorcing in the 1480s.
John Lindsay, 20th Earl of Crawford
Lieutenant-General John Lindsay, 20th Earl of Crawford (4 October 1702 – 25 December 1749) was a Scottish peer and the first colonel of the Black Watch on its formation in 1739.
Gilbert Talbot, 3rd Baron Talbot
Gilbert Talbot, 3rd Baron Talbot( c. 1332–1387) was an English nobleman and soldier.
He was the grandfather of John Talbot, 1st Earl of Shrewsbury.
Patrick Lindsay, 6th Lord Lindsay
Patrick Lindsay, 6th Lord Lindsay of the Byres,( 1521– 1589), Scottish courtier and Confederate lord.
Patrick was the son of John Lindsay, 5th Lord Lindsay, who died in December 1563, and Helen Stewart, daughter of John, 2nd Earl of Atholl.
Ludovic Lindsay, 16th Earl of Crawford
Ludovic Lindsay, 16th Earl of Crawford (1600–1652), was a Scottish landowner and Royalist.
He was the son of Henry Lindsay, 13th Earl of Crawford and Helen Chisholm.
Lindsay took part in the strange plot of 1641 called The Incident.
Having joined King Charles I at Nottingham in 1642, he fought at the Battle of Edgehill, at the Battle of Newbury and elsewhere during the English Civil War; in 1644, just after the Battle of Marston Moor, the Scots Parliament declared he had forfeited his earldom, and, following the lines laid down when this was regranted in 1642, it was given to John Lindsay, 1st Earl of Lindsay.
Ludovic was taken prisoner at Newcastle-on-Tyne in 1644, following the seven month Siege of Newcastle, and was condemned to death, but the sentence was not carried out, and in 1645 he was released by Montrose, under whom he served until the surrender of the King at Newark-on-Trent.
Later he was in Ireland and in Spain
and he died, probably in France, in 1652.
At the death of Ludovic Lindsay, the title Earl of Crawford was passed, despite senior heirs, to his cousin, John Lindsay, who had already been created Earl of Lindsay.
The earldoms of Crawford and Lindsay continued to be united until George Lindsay-Crawford, 22nd Earl of Crawford, (6th Earl of Lindsay) died unmarried in January 1808.
John Lindsay, 19th Earl of Crawford
John Lindsay, 19th Earl of Crawford and 3rd Earl of Lindsay( died December 1713) was a Scottish peer and politician.
Alexander Lindsay, 6th Earl of Balcarres
Alexander Lindsay, 6th Earl of Balcarres and" de jure" 23rd Earl of Crawford( 18 January 175227 March 1825) was the son of James Lindsay, 5th Earl of Balcarres.
He was a general in the British Army.
John Lindsay, 6th Earl of Crawford
John Lindsay, 6th Earl of Crawford (before 1483–1513) was an Earl of Crawford.
He was the son of David Lindsay, 1st Duke of Montrose and Elizabeth Hamilton, and married Marion Home.
He fought with Huntly, Argyle, Marichal and Lovat against Donald Dhu in 1504.
In 1512 he was accused of murdering his brother, Alexander Lindsay.
Called to appear in court in Dundee with his cousins David Lindsay and Alexander Lindsay, he was declared a rebel.
He died at the Battle of Flodden.
William Lindsay, 18th Earl of Crawford
William Lindsay, 18th Earl of Crawford and 2nd Earl of Lindsay( April 1644 – 6 March 1698) was a Scottish noble and politician.
Lindsay was the eldest son of John Lindsay, 10th Lord Lindsay of the Byres, 17th Earl of Crawford, and 1st Earl of Lindsay, by his wife, Lady Christian Hamilton, daughter of the Earl of Haddington.
William succeeded to the earldoms in 1678.
He was a zealous Presbyterian, president of the Convention parliament in 1689, a commissioner of the treasury in 1690, and one of the commissioners for settling the government of the Church of Scotland.
He married firstly Lady Mary Johnstone, daughter of 1st Earl of Annandale and Hartfell, in 1670.
They had one son:
He married secondly Lady Henrietta Fleming, daughter of Charles Seton, 2nd Earl of Dunfermline and widow of 5th Earl of Wigtown, and had further issue.
David Lindsay, 8th Earl of Crawford
David Lindsay, 8th Earl of Crawford( died 27 November 1542) was the son of Alexander Lindsay, 7th Earl of Crawford.
He was a member of Clan Lindsay, a Scottish Lowland clan.

Question: Who is John Lindsay, 6Th Earl Of Crawford's paternal grandfather?
Answer: Alexander Lindsay, 4th Earl of Crawford