Does the Greek word "Iesous" mean 'son of Zeus'?

yes lesous means son of Zeus.

The word Jesus is the Latin form of the Greek Iesous, which in turn is the transliteration of the Hebrew Jeshua, or Joshua, or again Jehoshua, (Yeshua/Yehoshua)

(yeshua) is a 2nd temple common Aramaic usage of the older Hebrew

yehoshua where the convention became (in 2nd temple times) to truncate the

theophoric. The name, therefore was yod (tsere) + shua and pronounced

yaySHOOwah. You must remember that there were pharyngeal fricatives and glottal "gulps" not used in Greek when they transliterated His name.

Ayins and Alefs were dropped in Galilean Aramaic much like Cockneys dropping their H's. Jesus was known by his Galilean contemporaries as YAYshoo.

YAYshoo to IHSOUS is an easy rendering.

Greek "Iesous", attempt to render the Aramaic proper name "Jeshua".

http://www.etymonline.com/index.php?term=Jesus

Greek "Iesous", from a late Hebrew or Aramaic analogous formation based on "Yehosûa‘ " 'Joshua'.

The New Oxford Dictionary of English

The Greek Ἰησοῦς (Iēsoûs) is a Hellenisation of the Hebrew יהושע (Yehoshua) or Hebrew-Aramaic ישוע (Yeshua ), (Joshua).

http://en.wikipedia.org/wiki/Jesus#Etymology

Greek Iēsous, from Hebrew Yēshūaʽ

http://www.merriam-webster.com/dictionary/Jesus

It has nothing to do with Zeus. Son of Zeus would be "Dios uios," Διός υιός.

Edit: Look it up. "Son of Zeus" is a pretty common phrase in Greek mythology, as you might expect. Perhaps you're confusing it with Θεοῦ Υἱός (son of god) in " Ἰησοῦς Χριστός, Θεοῦ Υἱός, Σωτήρ" (ΙΧΘΥΣ)