I thought I would add a different view point.
I did not stay when Istvan and Barbara ran this place, though from the sounds of it it would have been wonderful, however I did recently stay in May with the new renters/owners. I can only imagine it is devastating if the previous family have left due to sickness and had wanted to return to carry on a great place for pilgrims to stay when they are in a better place with their family.
However, I would like to say that the place was truly a little slice of heaven with the new owner. He is from Argentina and is running this with his son. He does not speak much English and so conversations are in Spanish or using translator but they were both very warm and welcoming, it was by a long mile the loveliest place and meal and the warmest most authentic welcome I experienced.
I am sure that is hard to hear for those that know Istvan and Barbara, but I guess I found some of the posts contained what I thought perhaps an unwarranted amount of ill will to the new establishment. Yes, perhaps they should have chosen a new name, maybe they intentionally did not because it was listed under this name in the Camino books and they wanted people to stop and wanted to be able to make a living. I can see this may be dishonest, but I can also see that it could simply be motivated with no mal intent for the previous owners and a genuine desire to make their new investment work for them.
I understand it is upsetting and I don't know the legalities around trade marks in Spain, but my understanding of trade marks in Australia is that the protection of trademarks do not apply if you are not using them. I don't know how long is considered not in use, but basically it is to stop people buying or holding trademarks to stop others from using them.
I hope this all works out well for Istvan and Barbara and the new family and that ultimately maybe there becomes two separate places for Camino pilgrims to stay in a warm, welcome and carefully thought out place after a long days walking.