There is lots of good information on this thread
http://www.rootschat.com/links/01rq7/This was linked to earlier on in the thread
A poster called TimothyMc has found
1850 census record for John.
He also found a link to a gravestone/memorial erected by the
brother of Bridget Hennessey (wife of John Walsh/Welch), so John's brother in law, and this states
" Erected by Laurence Hennessy of Lisvanane in memory of his father Thomas Hennessy who died April 1851, aged 71 years. May he rest in peace.
---
Donated the site of the Catholic Church in Lisvernane, County Tipperary with the agreement that the Hennessy family would be permitted the use of the churchyard for the burial of its members. Bridget Cleary Hennessy, his wife, was the first burial.
Thomas, born and died in Lisvernane, Parish of Clonbeg, Tipperary, son of Timothy and Kate (Fahy) Hennessy.
Married Briget Cleary.
Children:
Timothy (m. Alice Hennessy),
Laurence (m. Kate Sampson),
John,
Michael (m. Catherine Drake), died in Australia,
Arthur (m. Mary Jackson) imm. 1850 to US, died at Waterbury, CT, bet. 1860 & 1870,
Catherine (m. Robert Sampson),
Alice (m. unk Walsh) imm. to Australia,
Mary (m. Terrance Naughton),
Bridget (m. unk Dwyer), Eliza (m. John Merrick, 1884, imm. to Australia, d. 1920 in Mossman, New South Wales) "
TimothyMc also stated
'Also Bridget Hennessy married Jeremiah Dwyer on the 21-FEB-1845 Parish/District -- Galbally and Aherlow'
Glen of Aherlow
Lisvarrinane is another spelling of Lisvanane
Deb has also said 'My older siblings remember him (her father the grandson of John & Bridget) saying his people were from "Queen's". ' I have taken that to mean the former Queens County Ireland now Co Laois.
There is also this
'On August 14, 1857, a marriage license was taken out for John & Bridget, but never returned or documents pertaining, found.'
Was this reference to an index? Where please? Can you link please?
Just looking at the thread I have linked to above and the responses there are many clues to delve into.
I make the point that the inscription by Laurence Hennessy is worth exploring further, the father donated the Church land and land the gravestone is on apparently. It is family and more or less contemporaneous with death of the parents and the marriages and immigration of his siblings.
Perhaps it was Alice who married a Dwyer and went to Aus while Bridget married a Walsh and went to the US? Just throwing it out there in case Laurence did get it wrong.