I'm looking for a fic where Sirius has been given the task of waiting outside Hogwarts to register Harry and has dragged Remus along to queue with him. I remember they're trying to figure out what name to give Harry and end up giving him a really long name to incorporate everyone's suggestions; it ends with Remus having to tell Harry his real name in the future for his graduation. It wasn't a long fic and Lucius Malfoy, Frank Longbottom and, I think, Seamus Finnigan's mother, were in it. I know I read it on lj but I just can't remember where.
Has anyone heard of this?