You are welcome; there is an extensive study of these that lists over 2250 specimens: 'Coins of the Kingdom of Northumbria, c. 700 to 867', by Elizabeth Pirie; in that study, many of the coins of Eanred are noted as having retrograde
obverse legends, so looking again at your specimen, I think you are spot on, it seems to read XERDERNAE, i.e EANRED
REX