What's your choice?
No one would deny that Guahan is more poetic. It seems good and just to return to the original name. The problems, however, may be too much to overcome.
The first problem is that Guahan may not be the original name.
The second problem is cost. How much to replace all the stationery, envelopes, computer forms, etc, etc? As someone I know pointed out, how much to redo all the tattoos? What about the car stickers?
Finally, there's the small matter of public opinion. Our friends at PacificNewsCenter.com reported on a McNinch poll showing that 71% of the folks in Guam prefer the name Guam.