The name comes from Arenula ( the name is present in the modern Via Arenula ) , which was the name of the soft sand ( rena in Italian ) that the river Tiber left after the floods .
That built strands on the left bank .
The name comes from Arenula ( the name is present in the modern Via Arenula ) , which was the name of the soft sand ( rena in Italian ) that the river Tiber left after the floods , and that built strands on the left bank .