While I was researching my own Dunnigan ancestors, who were from Ireland, I discovered the following Dunnigan information of someone who is NOT related to me. I hope this helps someone!
Here's the information as follows:
"name: John Dunnigan residence: West Hoboken, Hudson, New Jersey birthdate: 1857 birthplace: New Jersey, United States relationship to head: Son spouse's name: spouse's birthplace: father's name: father's birthplace: Ireland mother's name: Elizabeth Dunnigan mother's birthplace: Ireland race or color (expanded): White ethnicity (standardized): American gender: Male martial status: Single age (expanded): 23 years occupation: Painter nara film number: T9-0785 page: 456 page character: A entry number: 2201 film number: 1254785 Household Gender Age parent Elizabeth Dunnigan F 60 John Dunnigan M 23
"United States Census, 1880," index, FamilySearch (https://familysearch.org/pal:/MM9.1.1/MN88-TDG : accessed 20 May 2012), John Dunnigan in household of Elizabeth Dunnigan, West Hoboken, Hudson, New Jersey."