Sometimes a peer has to add a territorial title to their name if there is already a peer using the same surname. When I received my peerage, there was already a Lord Norton, a hereditary peer. As I wanted to retain my surname, I had to add a territorial title. There is thus a difference between Lord Norton and Lord Norton of Louth. Lord Norton sat in the House until 1999, when he became one of the excluded hereditaries. We thus overlapped by a year, and variously received one another’s correspondence.
At times, the difference between peers with the same family name can be a notable problem. How often, for example, do the media refer to the Conservative Party co-chair as Lord Feldman, mentioning that he was a contemporary of David Cameron at Oxford and one of his tennis partners? Lord Feldman (Basil Feldman) is 86 and was not at Oxford with David Cameron. Lord Feldman of Elstree (Andrew Feldman) on the other hand…
And how often do the media refer to Lord Patten as Chair of the BBC Trust? Lord Patten (Johh Patten, a Cabinet minister under John Major) does not hold that post. Lord Patten of Barnes (Chris Patten, a Cabinet minister under Margaret Thatcher and John Major) does.
There are similar difficulties with a range of other titles where two or more peers share the same family name, though possibly not as high profile at the moment as in these two cases. Unless there is someone I have overlooked….