Hi Terry,
Thank you for your message. I hope that someone with information contacts you and helps you to find out more about your Irish heritage.
In the meantime have you tried searching for any records pertaining to the family at:
www.familysearch.org has a huge database of genealogical records including some church records for Ireland.
www.rootsireland.ie have a large collection of Irish Church records, however you have to pay to use this site.
I did a search for Tennants in Griffith?s Valuation. This is a property valuation survey carried out 1848-64. The only Tennants recorded in Wexford are http://www.askaboutireland.ie/griffith-valuation/index.xml?action=doNameSearch&Submit.x=46&Submit.y=20&Submit=Submit&familyname=tennant&firstname=First+Name&baronyname=&countyname=WEXFORD&unionname=&parishname=
These were recorded in 1853 and there is no way of knowing at this point if they are related to your Tennants. However these parishes may be a starting point for your search.
Some other websites that you may find useful are:
The National Archives of Ireland http://www.nationalarchives.ie/genealogy1/genealogy-records/introduction/
The National Library of Ireland http://www.nli.ie/en/family-history-introduction.aspx
The National Archives UK ? genealogy search: http://www.nationalarchives.gov.uk/records/looking-for-person/
The Public Records Office of Northern Ireland http://www.proni.gov.uk/index/family_history.htm
Irish Times: http://www.irishtimes.com/ancestor/index.htm
Genealogy links: http://www.genealogylinks.net/uk/ireland/wexford/index.html
From Ireland: http://www.from-ireland.net/county-wexford-genealogy/
Wexford Library: http://www.wexford.ie/wex/Departments/Library/YourServices/LocalStudies/What/
All the best,
Genealogy Support
