There Was a "Third Palestine"?

One could think that one 'Palestine' in more than enough.

A new book has been published. 

Written by scholar Walter D.Ward, it is not at all political but a study on the economics of a region. It "provides a comprehensive examination of the evidence for the economy of the later Roman province of Third Palestine, which roughly corresponds to southern Jordan, the Negev desert in Israel, and the Sinai Peninsula."

Where was that province?

In other words, there were two other "Palestines", all three really weren't one country and it was all Roman.

Some geography from the book:

So, they assertion that "Palestine" derived from the Roman Empire and that "Palestine" of the Arabs was never really a singly unit country is not some 'hasbara' claim but well-grounded in academic research.

As is well-known:

"in 132 CE in the period of the Bar Kokhba revolt the province [of Judea] was expanded and renamed Syria Palaestina. In 390, during the Byzantine period, the region was split into the provinces of Palaestina Prima, Palaestina Secunda, and Palaestina Tertia. Following the Muslim conquest of the Levant in the 630s, the military district of Jund Filastin was established."

Filastin is not an Arabic term but the transliteration from the Latin, just a Nablus is actually Nea Polis. Palestine is not Arab not original.

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UPDATE

The Arabs referred to as "Palestinians" claim descent from the Phoenicians.

But there's a catch:

"The Phoenicians...crisscrossed the sea connecting a vast geographic area...with an extensive network of settlements...and settled as immigrants"

Settlements?

^