1430 James Edmonstone, while still a boy, was among the sons of the nobility who were knighted by James I of Scotland at Holyrood during the celebrations which followed the christening of the King's twin infant sons.
He was born at Edmonstone, Scotland.
Sir James Edmonstone, Thane of Boyne married 1st Isabel Forrester, daughter of John Forrester, 3rd Laird of Corstorphine. After the Birth of their Child: John Edmonstone who succeeded him, Sir James & Isabella were then Divorced.
He married firstly, Isabella Forrester d. 4 Feb 1457, daughter of Sir John Forester (ancestor of the Lords Forester of Corstorphine). They had issue:
John Edmondstone b. Before 1457., who succeeded his Father: Sir James Edmonstone.
He married secondly, Janet Napier, daughter of Sir Alexander Napier of Merchiston, Provost of Edinburgh and Elizabeth Lauder, c. January 1457.[2] They had issue:
Elizabeth, m. Sir Patrick Blackadder, second son of Blackadder of that ilk[2]
Margaret, m. Sir Walter, second son of Sir Walter Ogilvie of Auchleven.[2]