Thanks for your reply, Carlos. Probably you are right.But I didnt know,or heard of any basque called Gabaldon or Gabalda.in exchange it is found often along the levantine coast and even in Catalonia where it has assumed the forms Gabaldó and Gavalda. I must say that before the Roman conquest of Spain, Spain was inhabited by celts,(celtic tribes extended along Ireland, France and Spain) and it is said that their language was very similar to the actual basque. Even the spanish language has its origin in the Basque.Then is not strange names were similar. So I keep thinking in the celtic origin of the name.