Whilst there are a large number of Decendants here in Australia from Johan Leonard Soderlund, there are only five members left with the surname. The current John is the eldest, followed by Graeme, then John's three sons.
John, Graeme, Michael, Peter, Geoffrey
However, most use an anglicized version Soderland.
Graeme is researching family geneology and had documentation and background information going back to the early 1700's.