A little bit off of the subject but here goes
yes he is one in the same (i.e. Chevrolet Motor Div)
also his brother Gaston raced at Indy and was the winner in 1920.
I have also seen the name Arthur Chevrolet in the early teens (1911 and on)
I assume he is related

Keith Nuetzman, nuet_ke@pts.mot.com
Motorola Inc.
Paging and Wireless Data Group
Boynton Beach, Fl