family tree

we are looking for help in tracing our family tree. all we know is that john calligeros--nickname possibly lambrogiannis--married katerina and had 6 children-spiros, peter, eleni, mary(who married vretos lourantos) koula(who married george calligeros)and soula(who married manoli) .peter and helen still live in the family home in kalamos. there is a cousin andreas(george and koulas son) who is married to maria(she works at potamos hospital. the only surviving children are peter and soula. any information would be great.thank you