::It might help if your reply was more pertinent. The two cases you mention are hardly comparable. Darnley is a historical figure who is mainly known to historians by the title he bore during the Lennox crisis. David Steel, as with other figures such as Roy Hattersley, has received a Peerage but prefers still to be known by his common name. Lord Mackay of Clashfern is neither historical nor does he eschew his Peerage title.