Weird name in iMessage when I copy messages
There are two possible reasons for this – Both which are caused by a friends most likely playing a prank on you – : Your name is incorrect on your contact, or your nickname is incorrect on your contact. I will be assuming your on an iPhone and not a Mac. If I have assumed incorrectly just comment and I'll change my answer although the steps are basically identical.

Change Your Name


Open Contacts and select the first contact labeled with "My Card"

Select Edit in the upper right hand corner

Delete the name listed in First Name and Last Name (Pumpkin Squealer De Luz Do You See) and replace it with your real name




Change Your Nickname (If available)

Method 1:


Steps 1 &amp; 2 from "Change Your Name"
Change the Nickname (Most likely 3rd option) or remove it completely




Method 2: (How your friend probably did it)


Ask Siri "Call Me [Insert Nickname Here]"


This will change your nickname.

Prevent this in the Future

I know your probably asking Wait...? I have a password on my phone how did my friend get in?. Great question! Although you have a password, Siri, by default, is enabled on the lock screen giving the lots of power including changing your nickname, sending texts, reading emails (from third party apps), etc. Assuming that this was the way they did it you can turn off Siri from lock screen by going to Settings>Touch ID &amp; PasscodeSiri.