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... I proposed this as well, and another thing NaN is quite close to is... Naan bread, lol.

Basically a kind of flatbread, usually associated with India, sort of kind of like pita bread.

Its pronounced like... Non, at least the way I pronounce Non, as a PNW dialect English native speaker, not like Nan, as in Nanna, or other similar words to refer to a grandmother, or sometimes mother, different vowel sound.