CRITHARY nee POTIRIS - Still living in Kythera

I am interested to know if Theodore Crithary and his wife Helene (nee POTIRI) had any children. They returned to Greece from Australia in 1933. Theo had a brother Peter who lived in Sydney.
I have heard there are possibly descendants of Theo and Helene living at Kythera (Mylopotomos?) and would very much appreciate knowing more.
Thank you
Phil & Marina