I do not have a Johan Floan yet. I do have a few others who may somehow tie into your family though.
My Floan's are
Marit Persdatter Floan b 1725
Per Jonsen Floan d 1755
I also have Floantro's who may or may not be related.

I also have a few sources who may be willing to lookup your family if you would like. Give me some more information about them and I will pass it on to see what we can come up with.