I found EE bonds in my house that belonged to my grandmother. The bonds are not in her name. My grandomother and the owner of the bonds are both dead

You need to register these bonds in the name of your Grandmother's estate.  You can do this through Treasury Direct.  An estate must be opened and a death certificate must be obtained for the treasury.  If you are the heir of her estate, you will receive the proceeds; if not, the legal heirs are entitled to the bonds