wasser on Family Tree Circles

Looking for the parents of my convict ancestor John Embury, he was married to Hannah Barnett in England 3 girls from this union, we have contact with this side, he was sentenced to life on conviction for burgulary.
He married again in Tasmania to a fellow convict Catherine Kelly, four children 3 boys one girl, last boy died presumed cot death, or the official version from records in Launceston Tasmania.( By Visitation of God )
Our brick wall is we have no details from pre 1800 of his parents, our only details are from church records in London 1801-5 we know their names are Charles and Sophia Embury, no other details have emerged despite our research, all family history is complete or nearly so after 1852 when they moved by ship from Launceston to Melbourne on the mainland, during the gold rush period in Victoria.
I have DNA results but this is inconclusive as the other Embury family in Australia who arrived at Robe South Australia in about the mid 1800s were from South Leigh and that area of England.
We are the same grouping but have presumed seperate tribal ancestors as we differ on two Elles presumed cousins. Haplogrouping I1 for both groups, origin ?? from northern Europe Norse etc.

Warren Embury.