Maybe your dark hair and brown eyes came from an Indian (Native American) princess, that your Viking ancestor took back with him.
You need to contact Elizabeth Warren to find out how to go about getting all of the goodies associated with being part-Indian.
Of course, I assume that you've got high cheekbones to use as proof ...
My Indian name is
Pash ta ni qua skani lossa
That roughly translates to
“One who pees on his own moccasin”