Proper noun
Tuscia
(historical) A region of Italy comprising today's region of Tuscany, a great part of Umbria, and the northern parts of Lazio.
This is the heart of the Etruscan Empire (many would debate that the heart of the Etruscan Empire was actually in the Maremma Laziale, in an area also known as the Tuscia, where Tarquinia was "the chief of the twelve cities of Etruria". Source: Internet
Cognate words developed, including Tuscia and Tusculanensis. Source: Internet