Gengos/Tzentzou - Seeking information

Does anyone have any information on the Gengos/Tzentzou family from Agia Pelagia, before Bill (Vasilios) married Calliope Coroneo(s) and moved to Australia in around 1913? A group of their descendants are planning their first trip to Kythera in Sept, and would like to meet any relatives there. Any information about Calliope and her family would also be greatly appreciated.