Margetis Family prior to 1900

I am looking for further information of the Margetis family (spelling maybe Marghetti, or Marietti)
My father arrived here in Sydney in 1903 from Friligianika area. Was followed by his brothers Dimitri, Menas & sisters Panagiotista & Evangalia leaving a sister Maria at home. She lived with her daughter Alexandra, married to Peter Barbakaris, who was a bee-keeper with a large apiary on the island.
My fathers parents were George & Vasilia Margetis. Vasilia was a Galanis.
I'm trying to trace George's family tree further. Any information would be appreciated