If the URL length will be ALWAYS the same (ie after the 66 character it will display the value you want), you can easily achieve that with slice(). Working example:
var str = "http://www.inversa.com/XV-MI-LJI-GLP-AIN-20181101-ADEA-PSNL-PR3-X/Marcus";
var res = str.slice(66);
console.log("Hello," + res);
Hope that helps!
Read more about JavaScript methods regarding tto strings here https://developer.mozilla.org/cs/docs/Web/JavaScript/Reference/Global_Objects/String
Good luck!
Note: in order to get the URL replace it with that line:
var str = window.location.href;
This will be good for your particular use case, but i think you should get that name from other source...