This is something I've seen in clickbait articles, /r/historymemes posts, and forum posts, often devoid of any and all context, and is conspicuously absent from any academic sources on "honorary Aryans." The closest I can get is a claim that a Nazi Party official got the declaration made in 1934 or 1936 so he could bring his Native American fiancée to Germany.

Judging by Hitler's praise for white America's efficiency in ethnically cleansing areas of the west during colonization, it doesn't seem like he or anyone else in the Nazi high command was too attached to them (Karl May fanboying aside).

Assuming that this is a fabrication, is there any idea as to where and when it originated?