Wi-Fi nickname

how one configure ones wifi router differ from router to router

many has a webserver so typing in their ip in a browser let you configure them

some has apps for ios to handle it

See if this helps, but try to keep it down to about 8 to 10 characters including a least 1 capital letter and at least 2 numbers. You can also use characters from the number keys e.g.: @£$%& or whatever characters your keyboard allows. Don't include your own name.

https://www.lifewire.com/best-router-and-home-network-names-3971335