I'm hopeless at recalling names and I put it down to the fact that I've no real reason to remember every name. When I go shopping I find I can't remember the names of certain items though I know what I want.
When my wife was first diagnosed with AD I could never recall the name of the person assigned to our case. As it became important to remember his name I designed a way to recall the name when required. Sixteen years later I can repeat it: Adrian Newton. Hadrian's Wall plus the apple fell from the tree= Newton. For other names I go through the alphabet and add a letter to trigger a name.
I'm of the opinion that we remember the name we consider important to us. I ask myself: how come I can recall names of certain people from my childhood, some 75 yrs ago and not others? They made an impression that remained.
One thing I can't do is recall directions and can easily get lost. For most of my life I put it down to being born left-handed and it being beaten out of me. In recent years I've learned it was due to having my head split open at about six years old. It was in the area of the brain that deals with orientation!
When you care, of have cared for a loved one with AD it is only natural to start question each time you forget somethings. Carers have more than enough brain activity and are too stressed to think clearly. Sorry to bore you.