Ravenna Cosmography
The "Ravenna Cosmography" gives the name of the fort as "Maia", and the Rudge Cup, the Amiens Skillet and the Staffordshire Moorlands Pan give the name as "Mais". Another name "Maio" appears a little earlier in the "Ravenna Cosmography" which may well be the same fort. The fort is not mentioned in the "Notitia Dignitatum". The name "Maia" means "The Larger". The fort was (by a small margin) the second largest fort on Hadrian's Wall. The largest fort was Uxelodunum, not far distant in Stanwix in Carlisle.