The arms of Faches-Thumesnil are blazoned : Quarterly 1&4: Sable, 6 bezants, overall a lion Or, armed and langued gules (derived from Faches); 2&3 Azure, an inescutcheon argent and in chief 3 mullets of 5 Or(Thumesnil). (Faches' original arms were bezanty, not 6 bezants. # reduced in the quartering.)
Faches Thumesnil is twinned with the market town of St.Neots in Cambridgeshire, England, and with the town of Naousa, Greece.