rugbyresults.fusesport.com
It is interesting to look at that list, and understand that of the 31 Kentwell winners:
8 are in First Division this year (Blue Mountains and Forest being the 2 without a Kentwell)
2 are in Second Division (Newport and UNSW)
2 are basically Third Division (Briars and Old Iggies)
3 are Fourth Div (Savers, St Ives, and Epping - tho you could make a case for them being closer to Third Div)
2 are in Sixth Div (Lane Cove effectively, and Balmain)
14 don't exist in effect, tho they may have evolved - someone with a better appreciation of the history might know more:
Bondi Life Savers
Bronte
Concord West
Coogee
Dundas Valley
Matraville
Moore Park
Newington Old Boys
North Steyne
NSW Fire Brigades
Roseville
Royal Aus Artillery
St Leo's
Western Suburbs