Leslie Stephen,
Dictionary of National Biography…
(1898)
“ STEWART, WILLIAM (1481?–1550?) , Scots chronicler and verse-writer, born about 1481, was great-grandson of one of the illegitimate sons of Alexander Stewart, earl of Buchan [q. v.] , and was thus descended from Robert II, king of Scotland. He was educated like his namesake, William Stewart (1479–1545) [q. v.] ”
