It is called the umbilical cord chaps. You all had one once upon a time.
Anyway, thanks all. The name, if anyone is bothered, came around after us both liking the name Freddie, but I then got worried in case he ever makes it big, in which case I don't think the name Freddie is a name with enough clout.
We then settled on Frederik, spelled as such as myself and the missus both have Scandinavian roots and both have Scandinavian first names.
Officially he is called Frederik, but to everyone that knows him he can be called Freddie (or Freddi, as my name finishes with the letter i).