Leolaia: 'Iaon' is the name of a a river in Arcadia (http://books.google.gr/books?id=6BxGAAAAcAAJ&pg=PA215&lpg=PA213&ots=3T40RIYlnc&dq=%CE%99%CE%B1%CF%89%CE%BD+%CF%80%CE%BF%CF%84%CE%B1%CE%BC%CF%8C%CF%82&hl=el). Apart from that google won't help more.
'Iaon and Zeus' (in Greek) is a study by an (ex)jw researcher and poet a copy of which I do not have available. I hope someone reading this thread might have one and provide us with a pdf.
Now regarding the rest if you understand Greek avail yourself with this book (from which I have quoted):
Πελασγικη Ελλας: οι προελληνες / Ν. Π. Ελευθεριαδου
It traces the roots of the Greek language in Proto-Semetic and in extend it is quite enlightening about many subjects like: passover, the ransom!
Pallini:
http://www.coptic.ru/lexeme/ab90a1a819844779927052c24b7a030a.html