Hi Didge2k16,
To help troubleshoot, ensure the information in your contact card on your iPhone is correct. Check out those steps here: Add your contact info on iPhone - Apple Support
Edit My Card
Tap My Card at the top of your contacts list, then tap Edit.
See if you're still experiencing the same problem after updating your device to the latest version of iOS.
You can learn how to update your device by following the steps in the link below.
Update your iPhone or iPad - Apple Support
In order to perform the troubleshooting actions we recommended via the article above, please read through and complete the steps in the section titled "Update your iPhone or iPad wirelessly."
1) Back up your device using iCloud or your computer.
2) Plug your device into power and connect to the internet with Wi-Fi.
3) Go to Settings > General, then tap Software Update.
4) If you see more than one software update option available, choose the one that you want to install.
5)Tap Install Now. If you see Download and Install instead, tap it to download the update, enter your passcode, then tap Install Now. If you don't know your passcode, learn what to do.
The reason why we're recommending the steps above is because updating your iPhone can actually resolve many issues with the device.
If the issue persists, reach out to Apple Support directly to help investigate the issue: Contact - Official Apple Support
Cheers!