My great-great-great grandfather's name was Dankert Dankertsen Krohn, but there were a LOT of men in the family by that name. I have a geneaology book from Bergen, Norway that shows one Dankert, born in 1842, married to a Julie Hansen. Could that be them? My book was published in 1875 and there were still a number of single D.D. Krohns at that time. Let me know if you'd like more information.