Do I name "name" after the var in JavaScript with any name I want

Answer 1

I supposed that you are talking about declaring a variable in javascript...
you may use any name you want to declare as a variable...
As var Abdullah;
let Abdullah;
or const Lawal
But it is better to declare a variable with the name according to its working in your code

Answer 2

yes, the name of the variable can be anything you want.

Answer 3

en declaracion se puede omitir, pero es mejor ponerlo por ser ordenado y legible, ES6 let y const