Did some research, and found in the following link for Belknap Mountain,
it actually refers to 'Gunstock' mountain, as part of the Belknap Mtn range.
So I guess that's the official mountain name.
Belknap Mountain
http://www.ask.com/wiki/Belknap_Mountain
FYI.... Belknap Mtn was Named after Jeremy Belknap (1744–1798), a renowned preacher, historian, and author,of The History of New Hampshire.
Gunstock Mtn - Wikipedia
http://www.ask.com/wiki/Gunstock_Mountain
FYI - List of mountains of New Hampshire ( listed by height)
http://www.ask.com/wiki/List_of_moun...hire?qsrc=3044
Who knew there were so many !
BD