Hi Pat,
Thank you for your response. I will try and answer your information systematically.
Anne Leane/Lane's parents are Patrick Lane and Margaret 'Peg' Larkin. Patrick was married previously and we think it was to Anne Collins. She had two children a son and a daughter. The son joined the Army and was in India. I don't know what happened to the daughter. It may be that Ann and her daughter died in childbirth, I have no name for that child either.
I have been doing some sleuthing using the Irish patronymic naming system and as the pattern was to name the first daughter after the previously deceased wife then that accounts for Patrick's first wife being called Ann.
I haven't found any marriage certificate for Thomas Collins and Ann Lane, but like you, I also found the missing dates and assumed there was damage to the original paper record that appears on the nli.ie website.
Thomas and Ann's children's names were Johanna, Michael, Patrick born in Ireland. Patrick was an infant who died on the voyage to Australia. Mary, Thomas, John, and another Patrick (died at 5 yrs of age) were born in Melbourne, Victoria, Australia. So I'm fairly confident that Thomas and Ann followed the traditional naming patterns. Please correct me if I am wrong but wouldn't Michael Collins be the name of Thomas' father? Michael was the first born son and he called his first son, my Grandfather, Michael as well.
As Johanna was Thomas' firstborn daughter, I assumed that was the given name for Thomas' mother. But I don't seem to have hit the jackpot there as I was unable to find a marriage for Michael Collins and a Johanna.
I'm open to any other suggestions you may have of where I could search next.
Regards, Christine Collins