in addition to the first two answers, Frankonian may also refer to the dialect which is spoken in "Franken"
By the way, the region produces an excellent white wine.
The link below shows a map showing Frankonia in relation to Munich, Regensburg, Augsburg, Stuttgart, and displays subregions within Frankonia
http://www.frankentourismus.de/gebiete/
hope this helps
regards,
Otto