Hi Laura,
My great grandfather was Emanuel Wisijahn. He was Emelie's brother. Their parents were Franz Wisijahn and Antonia Plocka. I have a tree on Ancestry you might want to check out. Just look for Emanuel Wisijahn. Please contact me through the Ancestry message system: Nancy2156. I can tell you where to get your g-grandparents marriage record. I also have a tracing of Emelie's birth record.
Can't believe I have found a Wisijahn cousin!!!! Do you have photos of Emelie?