African shape !

[ariel]

Originally Posted by Tim Simmons

Seriously I think many of these shapes may well be anthropomorphic, some possibly displaying fecundity. The shapes are abstract and very stylised a rounded mass may have its origin in the pregnant female form. Luc's avatar is often explained along with other similar versions as a man with outstretched arms in some learned journals. On the other hand I could be talking out of my @@@@ hole, hmmm. Tim

I think you are onto something!
Luc's avatar: it is a "cho" or a "kaura" of a Kukri!