Adrian will win. There are three cases. He won two. Third one is that they try to register his name or something. But with two won cases, he will be okay!
Sometimes it's a difficult case. Think Roger Waters and Dave Gilmour and their fight over the name Pink Floyd, but that's a totally different story and no family names involved... ...though there are people who think there's actually a mr. Floyd. I believe one of the record company guys (a big shot) made the mistake once to ask the band who of them Pink Floyd was:)
Dean is of course also another case. Same with Fender and his last brand with the 'Guitars by Leo' stamp:)
BTW: I love how an early Spinal Tap wanted to call themselves 'The Originals'. But there was already a band called The Originals, so the chose for 'The New Originals'