The first two in Melbourne, 1967-68, were called "Port Phillip Folk Festival"

The third, Brisbane 1969, "Moreton Bay Folk Festival"

The fourth, Sydney 1970, "Port Jackson Folk Festival"

The fifth, 1971 Adelaide, "Port Misery Folk Festival"

After that, I think, the numbering as National Folk Festivals took precedence. I can just see the Canberra one calling itself "Fat Cat Harbour Folk Festival" or some such...

For those in foreign countries, Port Phillip, Moreton Bay, and Port Jackson have geographical relevance. Port Misery and Port Jackson (and, to a lesser extent, Port Phillip and Moreton Bay) have historical relevance