Looking for Alexander Mcintosh and Jane Mcdonnel

I am the gr gr granddaughter of Alexander and Jane McIntosh from Inverness, Scotland who emmigrated to Victoria Australia. They had several children, one of whom was John Alexander. John Married Sarah Harrington in Victoria on 10th October, 1870 and they had several children one of whom was Roy Lionel Carrington McIntosh. Roy moved to Perth Western Australia with his mother Sarah when he was about 16 years of age and later married Lillian Maude Gibson in Perth in 1915. Lillian and Roy had 3 children one of whom was Lionel Ernest McIntosh.

I am interested in finding out any information about Alexander and Jane McIntosh and also any information about John and Sarah McIntosh.

Thank you