Kassimatis family

Hi, looking for any info on the KASSIMATIS family of Kythera and later Australia.

A relative of mine, a Theodosia PANARETOS, married a Ioannis "Jean" KASSIMATIS, and had children Fotini, Stavroula, Stamatia, and Europa.

I know that Fotini, Stavroula, and Stamatia all went to Perth, Australia in 1921. I know that Europa married and died young in Kythera. Any info on them would be great.
Peter Trearchis (age 15)