This gives a bit more info but it is not accurate.
From the top going down.
Georgios Zizos. (Gyorgios is almost Russian, Giorgio is Italian)
His wife was Maria (Zizou was not her family name).
His son Panagiotis (G. for George) Zizos and his wife Paraskeuvi A. (her fathers first name) Makandreas . Her grandfather must have been Scottish MacAndrew and her grandmother Greek, they must have lived somewhere near Corfu or Zante.
Taking into account that Mac Andreas means "daughter of Andreas" that it is possible the letter "A." stands for Andreas.
Further down you have George Peter Zizos. That is highly unlikely. Because of his name George, he must have been a first son, the second name is Panagiotis and not Peter because his grandfather was Panagiotis.
On the top you have Panagiotis "Peter" Zizos. Just because in USA they called him "Peter" that does not make his name is Peter.
Cleo Argyros is a great Greek name going back over 1100 years.
On the right hand site you have "Thomas" Efthimios Zizos. That is also wrongly presented. His name is Euthymios Zizos but in USA, they called him Thomas. SO his name is: Euthymios "Thomas" Zizos.
You will find errors multiply and the final picture is unrecognisable.
The 10th of May, Orthodox Greeks celebrate the festivity "Tis Zoodochou Pigis" (The Life-giving source). Accidentally or not, it is the day names like Panagiotis, Zissimos, Zisos, etc celebrate "Name Day".
Finally, "Panagiotis" first daughter was named "Jennie". Because we know his one Grandmother (Maria) that means the other Grandmother (Paraskevi's mother) was Ioanna.