Unfortunately, I don't know where in Ireland my SKIFFINGTONs originated. I will check Tyrone, Ireland, when I get a chance. I did a quick check of my favorite map site for Europe, http://www.expedia.com/http://www.expedia.com/, and did not find a Tyrone. Actually, that doesn't "sound" Irish to me, although I'm not an expert on Ireland. Have you found the place in Ireland?
Do you know where in Canada your SKIFFINGTONs lived? Mine were in Darling Township, Lanark County, Ontario, Canada.
I don't know of any of my SKIFFINGTONs going to New York or Iowa.
The names Ann Jane, Isabella and Charles SKIFFINGTON don't ring a bell with me.
Doesn't seem like a match, but I'll keep you in mind.