Tracing George Anthony Comino

Hi, just planning to visit Kythera in the next 4 weeks and would love to find out more information about my grandfather. My mother Doris Stella Goltz (Comino) was eldest daughter born to George Anthony Comino and Dolly May (White) who died giving birth to Doris Stella Comino in the Lockyer valley, Qld, Australia. George returned to Greece, possible Kythera and remarried. Doris Stella Comino was raised by her grandmother in Gatton and had little to do with her father when he returned with his second wife to live in Brisbane where he and his wife had other children together. He later died in the 1960's in Brisbane.
My older brother David Goltz has recently visited Kythera and has some information however we would like to complete more of my grandfathers family history. If you have any information, I would love to hear from you or arrange to chat with you when we visit Kythera with my family.
Thanks
Paul Goltz (grandson)