I’m wondering where you got the information that Stanley Ann Dunham was known as Anna Toot. I have just recently read the same thing but wanted to compare sources if you have a moment.
I pulled up many blog posts which seemed to indicate that Madelyn Dunham’s nickname was “Toots.” Apparently the Hawaiian word for “grandmother” is “Tutu,” and this could have been an adaptation. I do not know for sure if Stanley Ann was known as Anna Toot, but I know Dr. Orly Taitz put forth that theory early on.
She could have used it as an alias, but I have no proof of that.