NameLord William (3) de BORTHWICK 1st Of Borthwick , M
Birth Dateabt 1409
Birth PlaceCatcune, Midlothian, Scotland
MotherLady Borthwick , F
Spouses
Marr Dateabt 1427
Marr PlaceCatcune, Midlothian, Scotland
ChildrenMargaret , F
 William (4) , M (~1425-)
 Agnes , F (~1430-)
Notes for Lord William (3) de BORTHWICK 1st Of Borthwick
He [Sir William] is known to have had issue:

1. William, first Lord Borthwick

2. Janet, married, first as his second wife, to James Douglas, Lord of Dalkeith (whose first wife was the Princess Elizabeth, third daughter of Robert III), and secondly, to George Crichton, Earl of Caithness
3. Margaret, married first to William de Abernethy, killed at Harlaw, 24 July 1411, and secondly, after 9 December 1421, by Papal dispensation to William de Douglas, her sister’s stepson.

Source: THE SCOTS PEERAGE, ed. by Sir James Balfour Paul, Vol II, Edinburgh, 1906, pp. 95-6.
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Sir William Borthwick, the third of Borthwick,
had a letter of safe-conduct to pass through England, 9 June 1425, being with the bishops of Aberdeen and Dunblane, and seven others, ambassador from Scotland to Rome.

- He is said to have been knighted at the baptism of Alexander and James, the twin sons of James I, in 1430.
- In a Crown charter of 4 December 1450 he is described as ‘Wilelmus de Borthwic de eodem’;
- He is designed as Lord Borthwick in two Crown charter of 1454, the one dated 21 July and the other 27 Aocober; and
- he sat as a Lord of Parliament under the title LORD BORTHWICK, and sealed, as one of the barons, the instrument of forfeiture against James, ninth and last Earl of Douglas, on 17 june 1455.

He must have been raised to the Peerage in the interval between 4 December 1450 and 21 July 1454. According to the Auchinleck chronicle, a number of lords were ‘maid’ in the Parliament which began its sittings at Edinburh 12 June 1452, including ’The lord Borthuik of that Ilk.No instrument creating the dignity being extant, and a contrary descent not having been shown, the destination has been held to be to the heirs-male of the body of the grantee.

In Parliament, 14 March 1457-58, the chancellor, addressing himself to James, third Lord Dalkeith, who was about to marry the Princess Joan, sister of James II, stated that the King purposed to creat him Earl of Morton, whereupon Lord Borthwick, on behalf of his sister, Lady Dalkeith, represented that the lands of Morton heritably belonged to her and her son, and prayed that the King might do nothing to the prejudice of their rights. In answer, the chancellor explained that Lord Dalkeith was not to receive his title from Morton in Nithsdale, but from Morton in the territory of Caldercleir, of which declaration Lord Borthwick had a formal record preserved.

In 1459, 1461, 1463, and 1464-65, William Lord Borthwick was engaged in diplomac relations with England, but as

the date of the death of the first Lord is unknown,

it is impossible to say whether these missions ought to be assigned to him or to his son.

His lordship had issue:

1. William, second Lord Borthwick
2. Margaret, married to Sir John Maxwell of Calderwood, before 4 December 1450.

[Footnote: Sir Archibald Dundas of Dundas is said to have married Agnes, daughter of a William, Lord Borthwick.]

Source:
Source: THE SCOTS PEERAGE, ed. by Sir James Balfour Paul, Vol II, Edinburgh, 1906, pp. 96-7
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Sir WILLIAM BORTHWICK, 1st Lord Borthwick, born circa 1412,

-
created a Lord of Parliament at Edinburgh 12 June 1450-54 as Lord Borthwick of that Ilk,
- Ambassador to England 1459-73,
- Lord Auditor 1467,
- Knighted October 1430,

married first 1426-27,

and had issue,

1a Sir WILLIAM BORTHWICK, 2nd Lord Borthwick,
2a JOHN BORTHWICK, 1st of CROOKSTON,
3a Margaret BORTHWICK, married by 1450 Sir John Maxwell of Calderwood (died 1476), son of Sir Robert Maxwell of Calderwood, and had issue (see FARNHAM, B).
4a Agnes BORTHWICK, married 23 December 1452 Sir Archibald Dundas, 13th of Dundas, Sheriff of Linlithgowshire, son of James Dundas, 11th of Dundas, and had issue (see DUNDAS OF DUNDAS and MELVILLE, V).


Source: Clan Borthwick - http://www.clanborthwick.com/lineage03.htm
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