SC - Fascinating etymological study / too much free time???

[TG]

<< ... faux grenon ... a thick, somewhat grainy brown pottage. ... >>

There is a verb _grener_ 'to make grains of something, to put something
into a grainy consistence'; according to Littré the verb is attested
since the XIIth century.

Now, all you need is a decent handbook of historical French word
formation to look after the "-on" ...

Best, T.