Have you had a solicitor investigate?
Are you sure it is not registered- have you done a search. If unregistered, could still be Registry of Deeds, have you had searches made.
Titles like this are quite common, and in most circumstances title can be perfected, by a squattors application or a first registration. But you will need to consult a solicitor to look into it. Normally I would be able to tell a client after initial investigations very quickly what would be involved, the cost and the time- and then it is up to the client to go ahead or not.