Siri suddenly doesn't recognize most of my contacts
Over the last few weeks, I have been unable to get Siri to recognize even the most simple of names in my address book. It is quite infuriating. These are names like Cory or Jessica. It instead finds some similar word in the dictionary and says I have nothing in my address book that matches and would I like to search for businesses with that word.
I tried turning Siri off and then back on, thinking it might reset something on apple's end, but same result.
It seems to be fine for contacts I've taught Siri are related to me like "call my brother." But virtually every other contact name isn't working. Any ideas?
iPhone 5, iOS 7.0.4