Looking for William Rosa from Puerto Rico immigrated to Hawaii with his parents in the early 1900's late 1890's. Don't have any info on his parents. Records got lost in a fire. Some say his last name may have been Rosario, Rosadio, and even Guillermo. His nickname was "Powder Man" because he was a demolitionist. He was married to Annie Koholo Kapiko. Any more information that anyone can give is very helpful.