David Coad wrote in an email :-
Some of the Dillons lived in Cygnet (others on Bruny Island) but they are all from the same family. This is my Dillon website you may add to the Cygnet pioneers page.
The three Dillane convict brothers came from the townland or Catholic parish of Athea in the civil parish of Rathronan, West Limerick, Ireland.
The web site includes many well known names in the Cygnet district including Grace, Welsh, Garth, Tame, Smith, Harrison, Markham, Stack, Stanton, Halton, Bone, Polley, Miller, Thorp, Flemming and McNamara.
See also the Dillon Family
A link to Dillon family photographs