>I cannot find 'Indigeneity' in the dictionary.

here we are again, in the "dictionary." well, according to OED3, indigenity is just as rare as indigenousness -- each with exactly one citation.

but let's take a look at the story of the search:
indigeneity - 105,000 ghits (0 OneLook hits.. but soon to change!)
indigenousness - 58,600 gh (6 OneLook hits)
indigenity - 750 gh (1 OneLook hit)

-joe (with head too far in dictionary) friday