Hello micahneedshelpnow,
Welcome to Apple Support Communities. We understand the Siri is calling you by your son's name, and you get his contacts, and bookmarks. Let's take a look into this together.
When you go to Settings > General > About> Name. Do you see your name or his?
Here's how to change the name on your device:
Change the name of your iPhone, iPad, or iPod using your computer
Also, what do you see when you navigate to Settings, do you see your name on the first line on this screen? If you see his name, it means you're signed into iCloud on your device using his Apple ID email address. In this case, you'll need to sign out, then sign back in with your Apple ID, and password.
Please check out this helpful link:
Sign in with your Apple ID
Thank you for using Apple Support Communities. Have a nice day.