Hi Vanessa,
There really isn't enough information in your post for anyone to be able to help much. If you could provide a name or two and a time frame - approximate birth year or even an immigration year -it might enable someone to help. (And when searching in Schleswig/Holstein, don't forget to check the records for the southern part of Denmark. This area was under Danish rule, then in 1864 came under Prussian rule and in 1871 became part of the German Empire and then back to Denmark again in 1920. Many immigrants from that area would have listed Germany as their birthplace on records in the US or Canada)
J. Murphy