Ron, I am trying to trace the Carroll / Carl history in Australia. This is a strange coincedence that my ancestor Thomas Carroll changed his name to Carl. I cannot locate any brrothers or sisters, I do not even know his parents names. He was married in Tasmania, Australia on Sept 16, 1850, age 25, birth place Rosscommon, Ireland. He married Catherine Gaynor. Thomas and Catherine had children in Tasmania, then moved to Victoria, Australia and had more children, then changed their name. I would be happy to share what information I have with you, hopefully we may be able to help each other.