Colleen,
I am a descendant of Catherine McLusky, who was born in County Antrim in 1826. She married Hugh Donnachie at St Joseph's Chapel in Kilmarnock on 4 Jun 1847. Hugh was born in County Donegal. Catherine died in Kilmarnock at 27 Fore Street on 25 Apr 1896, aged 70. I haven't had much luck finding her siblings but I know her parents were Bernard McLuskey and Hannah Rodgers.
Brighton - great! Three facts that support my guess - name, Irish birth and Scottish marriage. Her Hugh was born in Donegal but found his way to Kilmarnock. So this progression does happen.
Unfortunately, this is not the Catherine that I found in the New York ship lists. But then again, this ship lists are 'soft', not conclusive.
I found a record for Catherine's death in Philadelphia in 1857, which explains why she isn't a part of James' life afterwards (marriage, baptisms as witnesses). But again, this could be another Catherine. (sigh).
One other 'fact' - we don't have any Bernards or Hannahs in the family. At all. My family repeats first names with confusing regularity. Plenty of James, Edward, John, Joseph, Francis - no Bernards.
So, while I take great comfort in this information, I don't see a direct connection just yet.
Thank you, everyone, for all the ideas!
Does anyone have a favorite website that I can search for verifying data? I know the US-based sites - Ancestry, FamilySearch - and others - rootsireland, Scotland's people, Amazon UK.
And yDNA sites like FamilyTreeDNA, YSearch,org, Haplozone.com
Now I'm looking deeper on the European side, figuring that UK sites would have more UK data like family trees.
Bryan Sykes's DNA site is hard to crack (ancestors...something) - he doesn't accept yDNA from outside labs. Yet his database should be mostly UK yDNA.
I got off-topic.
Thanks for your help, everyone!
Colleen