There are two places (at least) by the name of Fingal in Australia. One is in Tasmania and my knowledge is somewhat scant. Plus there is a rocky promontory just South of the Tweed River on the border of Queensland and New South Wales named Fingal Head. There are a number of places in very close proxomity which were first named by Capt. James Cook (eg Cook Is and Mt Warning/Point Danger). IF Cook named Fingal Head it is likely that his inspiration was associated with a familiar place name in Britain.

Regards
John