hello there,
i checked two sources for data on this family.
1. I checked anc and got the following parable from a variety of references>
James Thomas who was born 1814 Tasmania Australia (who probably appears in the convict musters with his namesakes)whos
spouse was Jane Gardiner [otherwise known as Spinks] (who was born 1820 Tasmania Australia and died 27th April 1859 Tasmania)
who married on the 14th October in 1844[number 870] gave issue to George Griffin Thomas on the 13th September 1847 in Hobart Tasmania.
I notice there is a James Thomas aged 66 with a birth year of 1816 ( which could be incorrect given the informants knowledge)has a death on
15th May 1882 and is buried in the Franklin St johns Anglican Cemetery at Huon Tasmania.( Reg number 248).
I notice a Charlotte Thomas aged 87 born circa 1786 dying on 13th November 1873 buried at the Northdown Anglican (private) cemetery at Latrobe Tasmania.
2. i then went to family search.org and used the search engine there , and lo'n'behold I entered Thomas in surname box, Tasmania in the "any" (place)
and , 6 pages of entries come up so that equates about 120 listings regarding Thomas family in Tasmania. ( as I recall the old IGI microfische did do Tasmania)>
https://familysearch.org/search/records/results#count=20&query=%2Bsurname%3Athomas~%20%2Bany_place%3Atasmania~and hopefully that link brings you to the page 1 of results I found.
I dont at the moment know enough about the structure of your kin and dont wish to double track what u may already know, so can u possibly see those pages if you havent seen them to see if anything pops.....
best i can offer at this stage for assistance on your topic, however, the tasmanian archives have always been forthcoming to me about my convicts there and i assume u have been in contact. Sometimes the convicts had bricks in the pavement in a town whose name escapes me....
Have a lovely holiday in Tassie when u go and good luck with your quest
m