I realize this message was posted ten years ago, but in case you are still out checking in on this thread, I wanted to share that I am also descended from Swan and Christina Ljungstrom. Swante Germanius was his full name. My lineage is through their daughter Hilda Sophia (Christina Marie's sister). Swante and Christina lived with my great grandmother's family while she was growing up in Illinois and Christina moved with the family to North Dakota and Minnesota after that. I have more info if you are interested. Hope this helps!