Thank you Shane for all the info.
I 've been searching for the past 9 years and have exhausted all records that I know of including those you have mentioned!
I have tons of records for Patrick from 1868 (his marriage on) to his death.
But as you may well know. US census only list the country of birth, never a town!
Earlier US census called everyone a "Laborer" and even though Patrick was a carver and gilder, he was not named as such until the later census which made things easier to confirm.
1 Canadian census listed him from England.
The rest of the US census list him from Ireland.
Civil War records list him from Ireland.
I can tell you every address of his from that 1868 date until his death!
It's just his beginnings I cannot confirm. There are no more relatives alive to talk to.
Family Lore was that our Kearney family came from Dublin and were RC and that's all I ever knew.
I could not place a Denis, Mary and Patrick on the 1841, 1851 English Census.
No one in my family has ever been named "Denis". But we have 4 Patricks, 2 Francis's and Emmet was used twice more.
On a hunch, I visited Calvary Cemetery to see if he was possibly buried with his son's son who died at 2. And he was! But alas, no head or footstone to glean any other information from

I have now ordered his death certificate to see if there is any valuable information on that.
As far as the names, another RC member kindly pm'd me and explained about the famous street names. Now I understand it is just not common to Dublin.
Patrick fought with the Fighting 69th in the civil war, and his son, Francis fought with the Fighting 69th in WW1. They stayed strong to their Irish roots even in America.
Of course his common name certainly doesn't help in my search..it's hard to make definite connections early on when everyone was named "Patrick" and everyone married a "Mary"!

Thank you again,
Deborah