So... I've found this method:
How to Change Wifi Host Name of Your Android Device - Nilesh

But... instead of using that method, I discovered another of way of changing your WiFi host name. (less hassle)

First, locate the file "build.prop" at root/system
then check the box and tap settings button(the three dots) or simply tap and hold the file then select "Open in Text Editor", and a warning message will popup... select "Yes" obviously. (see image below)



Now, scroll to the bottom... and you'll find these lines(see image below)



Simply add this line: net.hostname=<desired hostname>
Save and exit. Reboot. Viola. Cheers!



Naa ra ni nga option sa mga custom ROM mostly. Para ra ni sa mga wala mag custom ROM pareha naku. Natagbaw na ko, though I'm using a custom kernel.

Just sharing to you fellow istoryans...