Naming alternate characters in a font family

What is the best way to name an alternative character (ie Z or N) to fit within the family. I have used the Other section, is this correct or is there a better place for them? I have used altN to name the character, not sure this is right. Please advise

In Glyphs (and Glyphs Mini) you differentiate alternative glyphs by appending .alt to the name. So the alternative form of N would be called N.alt.

For more information have a look at the Glyph naming tutorial. (In particular, have a look at the “The Period” section.)