Re: Towle's in Australia
comments powered by
THE OXFORD NAMES COMPANION points to Nottinghamshire as mentioned by you.
No suggestions of other origins such as Ireland or Scotland, although two variants are given as being West Midlands and yorkshire, so not far removed from Notts.
Tow(e)ll, Toole (AD not in bold), Tole, Toll
Towlson, Tolson, Toulson.
(AD All the others are emboldened)
So generally your researches agree with TONC.