Zissimos must be a first name from ZO(=I am alive) (Zis) (=you are alive) etc.
ZO (ΖΩ) (verb) from ZOE (ΖΩΗ) (life).
Evangheliou is not a name. I guess it is Evangelou (son of Evangelos).
That makes everything worse. Keep digging.
There are many statistical records around: Where he lived, with whom, etc. FInd out when he died or parents died what did the obituaries said. etc etc.
Zizos could Zissimos (Latin Zizzimo) shortened to Zissos (Zizzos).
You could do a DNA check with the Italia ZIZZIMO and ZIZZIS to see if you have the same ancestors and how far back there is a connection.