I need help finding Johan Holm. He was born in Sweden in about 1828. He is the father of a child with my Great Great Grandmother, Ane Marie Sophie Nielsen. His daughter is Johanna Augusta Nielsen, born 2 August 1854, in Knudsker, Bornholm, Denmark. Johanna's parish record of birth lists the father as Johan Holm, of Sweden, who is already gone.
Does anyone have ideas of how to find him in Sweden or know more about his family?