Fiumana is typically Romagnolo, of Forlì, Cesena and Ravenna, Fiumani, absolutely rare it would seem to have some presence in the Ancona and Roman areas, Fiumano, equally rare is probably the result of incorrect transcriptions of the first, which should derive from names of places like Fumane of Modigliana or Fiumana di Predappio in the Forlì area.
Buy a heraldic document with your coat of arms
Verba Volant, Scripta Manent