Teddy/Cliff

My brother’s name is Clifford Theodore. Growing up I called him Teddy, and still do, but his adult friends and co-workers call him Cliff. This is why he is sometimes, in my posts, referred to as “Teddy,” and sometimes as “Cliff.”
Sometimes this confuses people. To which I say, “Well, if all of you called him Teddy, there’d be no room for confusion, would there?” I am unsympathetic.