Patrick Ennis, from Randalstown Co Antrim Ireland moved to Philadelphia

[Erato]

Good, we are on the track.  I'm back from the supermarket and I'll try to locate Patrick.

[Erato]

I'm not having any luck in 1920.  There are several Patrick Ennises born in Ireland but the birth dates are all pretty far off.  What was his middle name?

[Erato]

Here are a few possibilities but nothing connects them except the name, approximate birth date and location in the Northeastern section of the United States:

WWI draft registration:
https://familysearch.org/pal:/MM9.3.1/TH-1971-25987-19139-71?cc=1968530&wc=M9W1-WXT:1581244060

1930 census:
https://familysearch.org/pal:/MM9.1.1/X429-1L3

naturalization, 1920 in Pennsylvania [Eastern District]:
https://familysearch.org/pal:/MM9.3.1/TH-1942-25016-16720-61?cc=1937344&wc=M93Y-94T:n1556060009

[julesmc]

Sorry I have no middle name - did some searches but can come up with nothing. 

I was looking at your links but don't think any are a match.  The 1930 census dob matched however the immigration year was out.  Thanks for all the help tho!!  I shall have to keep digging

[Erato]

Yes, I noticed that the immigration year was way off in 1930 but I've found that this is one bit of data that people often reported inaccurately.  Usually not that far off, but I figured maybe [assuming it is the right person] he thought it referred to his date of naturalization.

He could have died, of course, or moved on to another country [Canada?].  Are you sure he didn't go back to Ireland?

[julesmc]

It maybe could refer to the naturalization.  He definitely didn't come back to his home place, so perhaps he did die or move on elsewhere.  Thanks again

[Erato]

If he was a church-goer, you might find something here:

http://www.diopitt.org/department-chancellor/office-archives-and-record-center