Michael Burke/Bourke : Short Biography

My great grandfather is said to have born In Ennistymon ca. 1843-45. His parents were Hugh and Hanora (née Wren).  Michael emigrated to Australia in 1865, leaving Liverpool on the ship, Marco Polo.  On various AustrLian documents, he says he 2s from Ennistymon (on most certificates) Ennis (on one certificate) Clare (on one certificate).  He further muddies the water abit when on one certificate he says he was born in Kings County.  My guess he was either born in Ennistymon or went ther with his parents as a young lad.  The only possible sibling we know of is Bridget, however, there is no definitive evidence of that. He died at Ulupna, Victoria, Australia on 15 September 1923. His death certificate said he was 80, while the notice in the local paper says he was in his 80th year.