how do i change the name of my wifi

Edit it in the browser unless, it's an Apple router

By using the AirPort Utility, as follows:

• Run the AirPort Utility.
• Select the AirPort base station that you want to change the Wi-Fi name on.
• Select Edit.
• Select the Wireless tab.
• Enter the desired Wi-Fi name in the Wireless Network Name field.
• Select Update, and allow the base station to restart.