Ahhh interesting, I didn't know it was an entirely separate, single letter! I was in Amsterdam a few weeks back and saw a lot of signage featuring "ij" had it stylised with the "i" sitting just above the tail of the "j" but never considered that it was just one letter.
Czech has this too, sort of, where "ch" is considered one letter but it is composed of two separate characters.
Czech has this too, sort of, where "ch" is considered one letter but it is composed of two separate characters.