Hello Shelley, I happened to see your post while trawling the messages. I come from Hampshire myself but do remember reading that the vast majority of BOYES families in NZ are descended from the (no extinct) line of Boyes's of Bresthanger in Kent. "Bresthanger" doiesn't look right as a spelling but they are mentioned in works like "Burkes Landed Gentry" etc.
Glenn. (homepage for genealogy: ttp://www.home.iprolink.co.nz/~gboyes.index.html