James Beag Stewart of Baldorran was the seventh illegitimate son of James Mor Stewart , who fled into exile in Ireland when his father Murdoch Stewart, Duke of Albany was executed for treason by James I of Scotland in 1425. James the Fat would never return to Scotland, and he was unable to inherit the Albany estates, but James Beag Stewart was able to secure a royal pardon and return to Scotland. He is the ancestor of the Stewarts of Ardvorlich on Lochearnside, whose family history is recounted by Sir Walter Scott in A Legend of Montrose.
James Beag Stewarts exact birthdate is unknown. It seems likely he was born in Scotland some time before his fathers exile to Ireland. Beag means small literally Little Stewart.
Source: Wikipedia