You can easily change the name of the quiz from the quiz editor.
1. First, make sure that you're logged in to your Quizizz account.
2. Under My Library, select the quiz you wish to edit
3. Click the Edit button as shown below
4. To change the name, click the Pencil Icon() next to the quiz name
5. Through the box that pops up, you may change the quiz name. You can also change the relevant subjects.
Click the Save button to save changes made to the quiz.