Looking for Lynchey Lynchy

Sarah LYNCHEY, widow was transported to Australia as a convict 1835. Sentenced Isle of Man 1833. Probably born County Down C1785,may be Poertaferry, Sarah Mullanor similar.
Brought 2 daughters and 1 son to OZZ.
Husband may have been Michael or James.Also possibly from Portaferry County down.
Sarah my GGG grandmother
I am retired live in Melbourne Australia.