Hi there .... My 'Kay' family settled in the Perth area in the 1960's ... where are you based family wise in Aus? I am in UK and have info on the 'London Kays' who ... we believe originated from Yorkshire. Our original 'Kay' was John Kay who married Mary Collins at St Andrew by the Wardrobe, London on 22 Sept 1774. I also have info on Goggin's, Mueller's & Moret's who feature largely in our side of the family in over the last 100 / 150 years. Anne Caroline Louisa Chapman (1874) is also a name also features large in the family history.
But be aware ... there are also the Lancaster & Suffolk Kay's in the mixture ... So we would need more info from you as to names, places etc to confirm a possible link. You can email me on my personal address
Sue84218@hotmail.com as I check that address Most days. Love to hear from you.