Many years ago IBM had amongst its internal fora, one labelled nitpickers. I came across it again the other day, but haven't delved deep into its archives (yet). One discussion which raged back and forth was whether "ij" in Dutch was really a "y" with a double dot diacritic or vice versa, and which came first, and whether the printers separated/joined it for convenience and what the diacritic on the "y" should be called.
I can't remember what the answer was now, so I'll just have to delve into the archives.

Rod