Phoebe = FEE-bee in Modern Greek and most likely FOY-bee in Classic Greek (refer to
http://www.foundalis.com/lan/grkalpha.htm )
Zoe: zo-EE in Modern Greek (you can hear it here:
http://www.hearnames.com/name-categories/greek-names/page7.html ) and most likely zaw-EE in Classic Greek based on the phonetic I listed)
Chloe: KHLO-ee in Modern Greek, and probably KHLO-eh in Classic Greek (based on the phonetics page)
Daphne: DAHF-nee in Modern Greek (you can listen to it here:
http://www.hearnames.com/name-categories/greek-names/page4.html), and probably DAHF-eh in Classic Greek (based on the phonetics page)