Hi Bunnykin,
The only possible connection I have is Arthur Stanley Boxall b. 1901, son of August Henry Boxall and Bertha Emlie Louise Pautz; do you have dates for the migration?
This is what I have on Arthur Stanley's ancestor's migration to S.A. -
Edward BOXALL (29), tailor from Middlesex, travelling to Stephen WHITEHEAD, Grahamstown, sailed on the Indian Queen,, dep Liverpool 20 May 1858, arr Port Elizabeth 23 July 1858
Our Boxalls seemed to start off in the Eastern Cape - I know some branches of the family did move north, so could be connected.
Have you contacted the one-name study at all?
Cheers,
Tisy