Lazaridis et al on Sicilians, Maltese, and Ashkenazi Jews.

[Sikeliot]

"While our three-way mixture model fits the data for most European populations, two sets of populations are poor fits. First, Sicilians, Maltese, and Ashkenazi Jews have EEF estimates beyond the 0-100% interval (SI13) and they cannot be jointly fit with other Europeans in the (SI12). These populations may have more Near Eastern ancestry than can be explained via EEF admixture (SI13), an inference that is also suggested by the fact that they fall in the gap between European and Near Eastern populations in the PCA of Fig. 1B."

Notice Greeks, Spaniards, etc. are NOT part of this cluster. The Sicilians in question are from Trapani and Syracuse. Greeks from Thessaloniki and Athens. I have no idea where the Ashkenazim are from. The Greeks overlap more with Tuscans.

Ashkenazim, Sicilians, and Maltese are genetically more or less one people.

https://s29.postimg.org/9zx0d8iw7/image.jpg
https://s28.postimg.org/xgabewmzh/image.jpg