FRJ said:
The "Hawken" rifle was made by the Hawken brothers in the mid to late 19th century. The "Hawkin" is spelled differently is a 20th century invention of marketing firms to ride on the popularity of the original Hawken rifles. There's a world of difference between the 2. FRJ
With all due respect the Hawkins appellation is not a 20th Century invention - while it is an incorrect spelling of the name, it shows up often in the period literature - remember that was a time where spelling was often loose and in many documents the same word may be spelled differently several times.
Here's some examples of the name in period spelled Hawkin - 1836 trade list:
8 Hawkins " from $20 to $26
2 Rifles Hawkins @$24
but then in 1837 it is Hawken
10 Hawkens Rifles @$24
In June 1839, one of the company's (American Fur) employees bought from "Jacob and Sam. Hawkins" a "smooth bord rifle $22".
In 1829 Etienne Provost, a French Canadian, became a partner in the American Fur Company. An entry for "2 rifles, Hawkins & Co., $50 " was made against his account. This is one of the few known early references to the purchase of a Hawken rifle by a mountain man. In the same year, Kenneth McKenzie from Fort Floyd (later renamed Fort Union) asked Pierre Chouteau Jr. for two rifles "similar in all respects to the one made by Hawkins for Provost."
1832 Trade list:
pd Hawkins for Pistols $30.00
Louis Simonds, an acquaintance of Lewis Garrad, spoke of a Cincinnatian at the Taos Insurrection of 1847 as: "Out in the pinyon, that morning, with big Saint Loui' gun - a Jake Hawkins gun, she was eh? He had bullets an inch long, with a sharp pit be doggoned ef they wasn't some, eh? - We had to leave him, but I guess he'll come in safe.
There are more........bottom line while the correct spelling is HAWKEN the Hawkin name was often used by writers in the 1822-150 period and later