This guide will let you know how to Change your Name in Dota 2. It is quite easy to do so, You just have to follow the simple steps to change the name.
For this, you have to go to the main screen and click on your name on the top left of your screen to open your profile. After that, click on the Edit Profile button, then click on the Display Name Field. You can type any name you want and then save your changes.
Once you play another match, your new name will display on the screen.