His parents, unknown to early biographers, were probably William Sinclair, a merchant, and Elizabeth Balfour.
In 1470, William Sinclair, 1st Earl of Caithness ceded his title to James III, and the following year the Northern Isles were directly absorbed to the Crown of Scotland, an action confirmed by the Parliament of Scotland in 1472.
William Sinclair) entered the gap, climbed the railroad embankment, and turned right into the underbrush, striking Lane's brigade in the flank.
William Sinclair, both of whom were elected to eight-year terms in November 2008.
William Sinclair who were both elected to eight-year terms in November 2008.
Henry was the grandfather of William Sinclair, 1st Earl of Caithness, the builder of Rosslyn Chapel near Edinburgh, Scotland.
William Sinclair, 1st Earl of Caithness, was at that time the Norse Earl of Orkney.
Later the same year, William Sinclair and Henry MacGregor acquired both streetcar companies and consolidated their operations.
In 1470 King James III granted the castle and lands to William Sinclair, Earl of Orkney and Caithness, in exchange for the castle in Kirkwall and the right to the Earldom of Orkney.
Baptists later emerged in the 18th century—in 1750 at Keiss, where the leader was William Sinclair and the church was established on the English Baptist pattern.
He was the grandfather of William Sinclair, 1st Earl of Caithness, the builder of Rosslyn Chapel.
Henry Sinclair was the son and heir of William Sinclair, Lord of Roslin, and his wife Isabella (Isobel) of Strathearn.
The Chapel was built by Henry Sinclair's grandson William Sinclair and was completed in 1486.
Karen Ralls has shown that among those testifying against the Templars at their 1309 trial were Henry and William Sinclair – an act inconsistent with any alleged support or membership.
William Sinclair (1410–1484), 1st Earl of Caithness (1455–1476), last Earl (Jarl) of Orkney (1434–1470 [de facto], -1472 [de Jure]), Baron of Roslin, was a Norwegian and Scottish nobleman and the builder of Rosslyn Chapel, in Midlothian.
William Sinclair was married three times: firstly to Lady Elizabeth Douglas, daughter of Archibald Douglas, 4th Earl of Douglas;
By Lady Elizabeth Douglas he had the following children: By Marjory Sutherland he had the following children: Illegitimate: The earl's second son of his second marriage, William Sinclair, became the designated heir of the Earldom of Caithness, and continued that title.
The chapel was founded by William Sinclair, 1st Earl of Caithness of the Scoto-Norman Sinclair family.
William Sinclair 3rd Earl of Orkney, Baron of Roslin and 1st Earl of Caithness, claimed by novelists to be a hereditary Grand Master of the Scottish stonemasons, built Rosslyn Chapel.
A later William Sinclair of Roslin became the first Grand Master of the Grand Lodge of Scotland and, subsequently, several other members of the Sinclair family have held this position.