william sinclair (1410&ndash;1484), 1st earl of caithness (1455&ndash;1476), 3rd earl of orkney (1455&ndash;1470), baron of roslin was a scottish nobleman and the builder of rosslyn chapel, in midlothian. ==life== he was the grandson of henry sinclair, 1st earl of orkney and son of henry sinclair, 2nd earl of orkney, for a time protector of the young james stewart, the later james i of scotland. he was lord high admiral of scotland, and was lord chancellor of scotland from 1454 to 1456. he became the first lord st. clair in scotland in 1449. he made several big territorial transactions during his life. the first important one was the exchange of his inherited lordship of nithsdale to the estates of the earldom of caithness - which soon led to his obtaining the title of earl in the peerage of scotland. king james iii gained his hold and rights of the norwegian earldom of orkney for the scottish crown in 1470 (see history of orkney), against a promised compensation (it turned out to be lands of ravencraig, in 1471); and william sinclair was thereafter earl of caithness alone until he resigned the earldom in favour of his son william in 1476. in 1471 james bestowed the castle and lands of ravenscraig in fife on william sinclair,ravenscraig castle in exchange for all his rights to the earldom of orkney, which, by an act of the parliament of scotland, passed on 20 february 1472, was annexed to the scottish crown. ==family== he was married three times, first to lady elizabeth douglas, daughter of archibald douglas, 4th earl of douglas; secondly to marjory sutherland, daughter of alexander sutherland of dunbeath, and lastly to janet yeman.balfour paul,vol ii, pp333-336 by lady elizabeth douglas (ca. 1408-1451): * william sinclair, 2nd lord st. clair (1436) was, in the opinion of the father, a wastrel, wherefore he was disinherited. his family received only the castle of ravenscraig in fife. * catherine sinclair, married alexander stewart, duke of albany * (second daughter, name not recorded) by marjory sutherland (married 1456): *sir oliver sinclair 1452 *william sinclair, 2nd earl of caithness. 1460-1513 *alexander sinclair ca.1454 *george sinclair ca.1453 *robert sinclair 1447 *arthur sinclair ca.1452 *eleanor sinclair, 1457-1518 married john stewart, 1st earl of atholl *elizabeth sinclair, c.1455-1498, married the laird of houston *margaret sinclair, ca.1450 married david boswell of balmuto *katherine sinclair 1440-1479 *susan sinclair ca.1451 *marjory sinclair 1455-80 *mariota sinclair ca.1455 
1410_births 1484_deaths Earls_of_Caithness Lord_Chancellors_of_Scotland Lord_High_Admirals_of_Scotland Norwegian_earls Scottish_Roman_Catholics Scottish_architects