Random thoughts here. It occurred to me that Perhaps the R was for Robau. I'm thinking George wanted to name him James Robau Kirk after his former commanding officer (having just finished his tour with the good Captain) but Winona over-road him since she was due to stay with the Kelvin or maybe she just didn't like him as much.
Gary Mitchell learned this story and thought Kirk had Robau level potential so he always called him James R. Kirk when using his full name.
Gary Mitchell learned this story and thought Kirk had Robau level potential so he always called him James R. Kirk when using his full name.