Hi Deirdre . . . Greetings from Roscrea, Co.Tipperary, Ireland . . .
So . . . you pose a serious challange . . to adding substance to your family search . . .
The first problem . . is the stretch back in dates . . . which are a time before Irish records . . .
R.C. Church Parish Records ( Roscrea ) . . earliest entries are 1810 . . . see . . . https://registers.nli.ie/parishes/0805
I searched " Ancestry " for the earlier Limerick connections . . Maurice Ginane c.1750 . . also spelling Giunane . . also Guinan
I did find a PATRICK Ginane being baptised . . . 1772 . . . ( see below ) . . original entry in Limerick Church ?? Father MAURICE . . Mother . . Margta Crawby
of PATRICK's marriage in Offaly ( a.k.a. Kings County ) . . . I found NO positive trace . . .
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The Surname - spelling . . Guinan . . . appears from my search. . . to be more common to . . . the County in Ireland
known as Offaly (nowadays) . . . or (aka) Kings County . . .
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Roscrea In Co. Tipperary. . . the Town is geographically situated . . . within a mile of two neighbouring County boundries
. . . namely Kings Co. . . . and Laoise ( aka ) Queens County.
This makes for a great confusion when searching . . especially if the search family were in Farming Lands . . .
BUT . . there are some clues available . . .
We still have records from 1823 - 1837 . . known as " Tithes Applotment " . . . wherein is recorded Guinan;s for the Roscrea area . . . ( see Guinan search # 1 . . below )
Also ( see #2 ) . . . the last two Guinan names are within a few miles of Roscrea . . .
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Then . . . there are records . . . known as " Griffiths Valuation " 1847 - 1864 . . . ( see #3. )
and - - in #4. below . . . you will see the name GUINANE . . . all in close proximity to the Town and surroundigs of Roscrea.
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Again . . .I refer you back to the R.C. Church records of Roscrea . . beginning 1810
you will find these at this site online. . . .https://registers.nli.ie/parishes/0805
with luck . . and patients. . . you may find your ancestors Baptism record . . in a spread . . say . . 1817 to 1822 . .
For want of information . . I failed to find any trace of a Catherine Smith . . .
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and then the story leads to Canada . . . where . . I presume you already have most of the records . . .
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I do hope . . some of the above will be of some use to you . . .
Should you have a specific question . . . I would be glad to assist . . .
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Cheers . . . Eamonn M. Horan ( I.R.O.)