You responded to my message below and helped a great deal. I have filled in heaps of of gaps by looking for names such as Kenna. I have tracked down Edward Kennagh? (Arrived in Australia as Kennar, son was baptised as Kenna, and the children were married later as kennagh.
But I really wanted to say was that the names you mentioned are similiar. edward had 4 children Ellen, John, Margaret and Mary. Similiar names and surname. Could be related. I am ordering certificates which should tell me where they came from.