Careful, the ....of Timbuctoo bit is part of the boat name. The hailing port as it's called is not linked by ...of.
When you see a boat name such as Dreamer of Hamble it's because there is another Dreamer registered so that name is taken and the new registeree modifies the name to make it unique. Dreamer of Hamble could have a hailing port, usually written in black letters under the boat name on the stern, of Fleetwood.
If you just list your boat on the SSR you don't need a hailing port and can call the boat what you like, within reason.