push/view an array based on a string

Question

I perform a function to return strings.

in example

let tName = adjustNametoArray(1);
console.log (tName); \\ "scoobyDoo"

I also have an array with the same "name";

var scoobyDoo = [];

What I would like to do, take that string "scoobyDoo", then push data into my empty scoobyDoo array.

let tName = adjustNametoArray(1);
console.log (tName); \\ "scoobyDoo"
[tName].push("ruhroh");

console.log(scoobydo[0]); \\ "ruhroh"

This however does not work, with no error.