How to do this with four steps:
1. First you open WhatsApp and click on the three dots shown above.
2. Then click on Settings from there, where you will see many options.
3. There you will see the option named Storage and Data, click on it.
4. Even after opening it, many options will be seen, there you have to click on Manage Storage.
By clicking 5, you will see the complete list. The first name you talk to the most.