Hi my name is John Batibasaga. I'm from Australia, temporarily living in Sydney. As you can see I am not an Iselin, although my mum was- Sandra Mary Iselin- she died in 1974 from cancer. Her great grandfather's name is Caspar Ronald Iselin from Brisbane Australia.
I too am researching the Iselin family and by chance came across your site, which, of course, is very exciting!
I would be interested to know the name of the Iselin that came here to Australia and settled in Brisbane sometime during the 1800's.