Looking on FamilySearch, there is the 2 Apr 1904 marriage of Charles John Mickelson and Amanda Carolina Johnson. No image available, but the info says his father was Mickel Rack and mother Catarina Rack. It gives Amanda's as Johan Israel Rack and Anna Lisa Rack. I'm probably sure the Rack was shortened from something longer. There's a family tree on Ancestry, but not much more definitive as to birth place.