I'd like to determine if Henry McEwen and Nancy Archer [[Archer-6142]] of Wisconsin (USA) are the same people as Henry McKowen/McKeown and and Nancy Archer [[Archer-6180]] of Ballyriff, Co. Londonderry, Ireland.
Are there any Wisconsin civil records available that might help with this?
The census shows Nancy is roughly the same age, and born Ireland but I am hoping for something more specific to confirm it, e.g. a more narrow location, or a parent or relative's name.