My son-in-law is an Alaniz/Alanis. His grandfather said their ancestors were from Spain. The original spelling was Alanis. His family migrated to Mexico and then to the US. He has his tree back to his gr. gr. grandparents. You should be able to locate a crest online. I found one a few minutes ago. If not there are companies who will do a search for a fee and send to you. Happy Hunting!