Yes he is.
Kern Dunagan was a Medal of Honor recipient. He got the purple heart for wounds he received during the battle where he received the MoH.
Donald P Kremer
Congress
Currently there is no listing found that lists a Joseph Daniel Cannon with the United States Marine Corp receiving a Purple Heart for Vietnam. Detailed list are routinely updated to be checked again.
Military Order of the Purple Heart
An estimated 351,794 individuals received the Purple Heart during the Vietnam War and no comprehensive list exists.
There were an estimated 320,518 awarded.
do you want a list of people that won a Purple Heart with the oak leaf cluster? In Vietnam in 1967
it is a sentence that report your def. it is a sentence that report your def.
Ask to see his paperwork.
There may be, but although the Purple Heart Medal is a prestigious award, it is of a lower precedence than about twelve other US Medals. So many of these have been awarded since 1932, from WWII, Korea, Vietnam, Iraq/Afghanistan, it would be impossible for the US Military, let alone an individual state to compile a list.