Question: Who is David Lindsay, 3Rd Earl Of Crawford's paternal grandfather?

Knowledge 1: David Lindsay, 3rd Earl of Crawford
David Lindsay, 3rd Earl of Crawford (died 24 January 1445) was a regent to James II of Scotland.He was a member of Clan Lindsay, a Scottish Lowland clan.He was the son of Alexander Lindsay, 2nd Earl of Crawford by his wife Marjorie.At the Battle of Arbroath in 1445 the Clan Lindsay, led by the Master of Crawford, advanced with over 1000 men.Their enemy was the Clan Ogilvy who were also supported by men from the Clan Oliphant, Clan Gordon, Clan Seton and Clan Forbes of Pitsligo.The Earl, who was the Master of Crawford's father, rode between the two armies in an attempt to call a truce.However, an ill-advised Ogilvie, thinking that this was the start of the Lindsay's attack, threw his spear at the Earl, hitting him in the mouth and killing him instantly.So the battle began which went in the Clan Lindsay's favour. [SEP] Knowledge 2: Alexander Lindsay, 2nd Earl of Crawford
Alexander Lindsay, 2nd Earl of Crawford (c. 1387–1438/1439) was a Scottish magnate.He was the son of David Lindsay, 1st Earl of Crawford and Elizabeth Stewart, daughter of King Robert II and Euphemia de Ross.He was knighted at the coronation of King James I on 21 May 1424, and subsequently was one of the hostages for King James given over to the English from 1424 until November 1427.
Knowledge 1: David Lindsay, 3rd Earl of Crawford
David Lindsay, 3rd Earl of Crawford (died 24 January 1445) was a regent to James II of Scotland.He was a member of Clan Lindsay, a Scottish Lowland clan.He was the son of Alexander Lindsay, 2nd Earl of Crawford by his wife Marjorie.At the Battle of Arbroath in 1445 the Clan Lindsay, led by the Master of Crawford, advanced with over 1000 men.Their enemy was the Clan Ogilvy who were also supported by men from the Clan Oliphant, Clan Gordon, Clan Seton and Clan Forbes of Pitsligo.The Earl, who was the Master of Crawford's father, rode between the two armies in an attempt to call a truce.However, an ill-advised Ogilvie, thinking that this was the start of the Lindsay's attack, threw his spear at the Earl, hitting him in the mouth and killing him instantly.So the battle began which went in the Clan Lindsay's favour. [SEP] Knowledge 2: David Lindsay, 1st Earl of Crawford
David Lindsay, 1st Earl of Crawford( c. 13601407) was a Scottish peer who was created Earl in 1398.
Knowledge 1: David Lindsay, 3rd Earl of Crawford
David Lindsay, 3rd Earl of Crawford (died 24 January 1445) was a regent to James II of Scotland.He was a member of Clan Lindsay, a Scottish Lowland clan.He was the son of Alexander Lindsay, 2nd Earl of Crawford by his wife Marjorie.At the Battle of Arbroath in 1445 the Clan Lindsay, led by the Master of Crawford, advanced with over 1000 men.Their enemy was the Clan Ogilvy who were also supported by men from the Clan Oliphant, Clan Gordon, Clan Seton and Clan Forbes of Pitsligo.The Earl, who was the Master of Crawford's father, rode between the two armies in an attempt to call a truce.However, an ill-advised Ogilvie, thinking that this was the start of the Lindsay's attack, threw his spear at the Earl, hitting him in the mouth and killing him instantly.So the battle began which went in the Clan Lindsay's favour. [SEP] Knowledge 2: 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.

Answer: David Lindsay, 1st Earl of Crawford