I found their census records and marriage records; the three couples were married in Philadelphia between 1893 and 1900.
First I decide to plot their addresses in 1900 on Google maps. Delia McCormick (just before her marriage to John Kelly) was a domestic servant in a household on 1811 Walnut St. Thomas and Margaret McCormick were living at 204 Mifflin St., and Michael and Margaret McCormick were living at 332 Cantrell St. They lived fairly close together, near the waterfront on the Delaware River.
I decide to look at newspapers to find out more about these priests, in order to verify what church they were with. I found two articles that verified both Rev. Ward and Rev. Zeller were priests at Sacred Heart.
What's more, in browsing through these marriage registers, I found another McCormick: John McCormick married Sarah Bernadette Boyle at Sacred Heart in 1895. Could he be related?
The focus on my next segment of research will be to look through the parish registers for Sacred Heart. The McCormick/Kelly families I'm researching had a combined total of fifteen children between 1894 and 1915; with all those baptisms there should be some extended family members as sponsors. I'll look through the marriage registers, as well.
And just as I suspected, it looks like our McCormicks had family here - waiting for them.
I was amazed at how much more information I found about these families by moving away from Ancestry to other websites and databases. In this research, I used FamilySearch, Google Maps, Newspapers.com, and the Catholic Heritage Archive. And as I always tell my audience at the end of every single presentation I do:
There is always something more to find!