Tanya I have a record of an Augustine Sarsfield who emigrated to Nova Scotia in the 19th century. He had 13 children including a Michael who married an Elizabeth Ellis. I have further info on their descendants. It seems along the way they changed their name to Sarchfield - so have a look at that forum too. Do you have any more info about him, his family or descendants ?
If you would like more info or help, let me know - also have a look at our family history on rootsweb.com