My boyfriend gets very cross when I shorten Buttons' name to Butt-butt. Needless to say, I don't think my cat recognizes his full name at this point. However, we are getting a new feline house mate in September, who is currently staying with me while his owner is away, called Butters. I'm thinking that Butt-Butt may be a convenient way of getting both their attention at the same time.
I am following online advice about introducing cats, so they are currently separated by the door in my living room. They have both been very curious as to what is on the other side of it and I will allow them to see each other in a day or two. The benefit to Butters spending a couple of days with us before he moved in, is that if I don't introduce in a way that makes them accept one another, I get a second shot at it. Buttons is quite stupid, so I have every confidence that he would be able to have a clean slate memory-wise, if worst came to worst. Butters' owner says he to is not the brightest cookie in the tool shed either, though he thus far hasn't seemed as stupid as Buttons. They are both very sweet cats so I am reasonably confident they will be friends.