While Marsia/Marzia/Marcia is an actual personal name, the region of the now Abruzzo that was at the time inhabited by the Marsi tribe is and were called (as in ancient time as now) Marsica.
Also, the most preeminent feature of the region was the Fucino lake (Fucinus Lacus), it was more or less of the same dimension of the Bolsena lake, and is famous for being dried up in the 19th century, so at the time of the Roman Republic the lake was there.
Also, the most preeminent feature of the region was the Fucino lake (Fucinus Lacus), it was more or less of the same dimension of the Bolsena lake, and is famous for being dried up in the 19th century, so at the time of the Roman Republic the lake was there.