Oh, and ancestry has Ingeborg Rebecka Quarnstrom, daughter of Clara Augusta Quarnstrom, born 9 Aug 1878 at St Petersburg, listed in the Sweden, Indexed Birth Records:
http://interactive.ancestry.co.uk/22...nSearchResults
They also have the image for the Rudolf Leopold record:
http://interactive.ancestry.co.uk/22...nSearchResults
But that database only starts in 1860, so Carl wouldn't be included.