At first I was thinking it could have been a brother of his but dismissed this idea after some thought. I figure if he cared as much as he did when they lost
Tommy that he'd care about finding his brother, even though he was rather unwilling to deal with the death of his parents.
I'm leaning more towards the idea that
Randy could be a soldier friend of his he lost in the war. Though the alternate spelling provided in the thread topic is making me wonder if there is a slight chance that Randi could be a woman. Maybe we'll learn in time.