Descendants of John Henry Mccan IN Australia

John Henry McCan with his wife Catherine travelled to Australia some time about 1840. With him came his son Joseph and daughters, Mary Anne, Catherine Anastasia, Teresa. John died Jan. 1854 in Reilly St. Sydney and Catherine about 1860. Possibly in Melbourne where her son Joseph was living at the time. Joseph returned to Ireland in 1863 but I could never find out about his sisters. I would guess they married. At any rate there seem to be no MccCans in Ossie today. Any information out there ?