I think it has to be a title that has some kind of connection with you. I believe Harold Wilson chose Baron Wilson of Rievaulx. Rievaulx is a small town in Yorkshire, where Wilson was born. Nearby stands the famous early Cistercian Rievaulx Abbey.
I suppose Roger's equivalent would be Baron Kettle of Arbroath. The connection with the famous Arbroath Smokie means he would inevitably be known as Lord Kettle o' Fish.