Sue,
I see a couple of reference to the Arrundel surname in this book" Early
Virginia and its people" by Thelmas
Bastow.
Arrundell's: Richard living in James Citte 2-16-1623
Petter " "
Bucke Row 2-16-1623
John " " " " 2-16-1623
Elizabeth " " " " 2-16-1623
Margareat " " " " 2-16-1823
This material does not indicate any relationship, but surely they were.
There is no mention of the Arnold surname.
Hope this aids in your search.
Elaine