sounds like "Nees Furgun"

[Lilly]

Guess the first could be your answer.

Meenafergus Co Tyrone.
Curraigfergus Antrum
Drumfergus Armagh
Tirfergus Co Down

[davidyoung]

It's been quite some doing, but I finally located Margaret's death certificate. Her son reported that her birthplace was Belfast, which is consistent with earlier reports that it was "Ireland" and "North ireland." After staring at the census sheet, I ultimately became convinced that the entry in question was indeed "Michigan."

Thanks for everyone's help!