Hi - I see HR Ficken made a start at finding the immigration record for your family and gave some suggestions.
If you'd like forum members to help you, begin by posting as much information as you can (for example, a full place name rather than just Wisconsin).
As you know, Christian Holm is a common Danish name, and every detail will help you differentiate one from the other.
============================================ Below are a number of useful links or names of websites. I hope there are enough clues here so that you can find the site even if the link doesn't work. ============================================ My Danish Roots is a good beginning website.
Family Search is an excellent free online search tool with many databases, including some Danish church records. Family Search also has a Denmark learning page that introduces Danish family history.
Ancestry.com is pay subscription site that is our best resource for immigration records - people coming INTO the USA.
Most of the Danish records you’ll want were kept by the church - birth/baptism, vaccination, confirmation, marriage, death, and sometimes movements from one parish to another were all noted in the parish books. Parishes served not only a religious but also a civil/governmental purpose.
An easy site to use for Danish census records is www.ddd.dda.dk. Below is a link on ddd.dda.dk that is set for searching in Aars herred, Aalborg amt (this is like saying King County, Washington - where Seattle is). The Christian Holm found immigrating (by H.R. Ficken) had been living in Houbro in Aars, Aalborg. An emigrant database is available on ddd.dda.dk (people leaving Denmark from Copenhagen, not a complete database of all emigrants). So are some church records, and a map (kort) of Denmark showing the political divisions used in family history research. Choose the English language option on the site if you wish. http://www.ddd.dda.dk/soeg_person.asp?sit=4http://www.ddd.dda.dk/soeg_person.asp?sit=4
Slaegt og Data “Find Your Family in Denmark” is a chat forum where Danes and others help seekers to find their Danish heritage. Some of the contributors to Genforum’s Denmark page also contribute within “Find Your Family in Denmark.” (By the way, never post a query in more than one forum without alerting volunteers about the duplication.)