What is the meaning of Kephale? 

Further reading:

http://www.waynegrudem.com/does-kephale-head-mean-source-or-authority-over-in-greek-literature-a-survey-of-2336-examples

http://www.waynegrudem.com/the-meaning-of-kephale-head-a-response-to-recent-studies

https://www.waynegrudem.com/meaning-of-kephale-after-30-years