Family history

Hi, we have been MIA for a long while!! Still trying to find missing links in family history, unfortunately the " oldies" have all passed away, and it's very difficult to find information.. our son is very interested in knowing, as are we! We want him to know his heritage and be proud of the strength and courage they showed through the generations My husband is from kalamos, via his grandparents.. a little tiny dot on the map called xeroniamata.. Not even sure where to start!! We know there is a connection with kalokerinos ( smiles) family we had met in Sydney many years ago, and a cassimatis connection through my husband's grandmother Katerina .. and we have cousins in the Brisbane region, unfortunately age has faded some of our memories.Any leads would be greatly appreciated, thank you ????????????