Oh beloved Tunisia! I taught in Gabes for 2 years and traveled throughout the wonderful South. I would love to know what your results are.

There are several theories circulating, but DNA evidence seems to have answered this question:

http://www.blackwell-synergy.com/links/doi/10.1046/j.1529-8817.2004.00096.x/enhancedabs/?cookieSet=1

http://www.journals.uchicago.edu/AJHG/journal/issues/v76n5/42165/42165.web.pdf?erFrom=-6049320234360110793Guest

http://www.journals.uchicago.edu/AJHG/journal/issues/v75n2/41184/41184.web.pdf

http://findarticles.com/p/articles/mi_qa3659/is_200110/ai_n8955294

http://www.biomedcentral.com/1471-2156/4/15

http://www.nature.com/ejhg/journal/v9/n9/abs/5200693a.html

http://muse.jhu.edu/login?uri=/journals/human_biology/v073/73.5lucotte.pdf