I am also descended down in this line. My great grandmother was Elsie Goldstrom who's father was Andrew Oscar Goldstrom, and his father was John Goldstrom (Jan Magnus Eriksson Gutke).
The furthest I have been able to get is Daniel as well. MY great Aunt tells me though that there were twin brothers that were princes and 1 took the throne and the other left to Sweden. But I can't find anything about that. So I don't know how much of that story is true.