Personal code randomly generated by the system.
"League of Legends" allows duplicate names in the game. In order to distinguish different players, the system will add a string of randomly generated numbers after the player's name as a personal code. Multiple players with the same name can also be distinguished by different numerical codes.
The number after the League of Legends name can also be used as a basis for adding friends, allowing players to more accurately find and add the people they want to communicate with.