Board Thread:Grimm Fanfic/@comment-29777876-20160827162945/@comment-29745488-20160829110439

George's last name is Kessler. The only possibility is that Trubel used her mother's maiden name like Theresa Rubel (-Kessler). And if its Aunt Marie's child her last name would most likely be Kessler- Kolt (if she married Farley Kolt).