Donua

According to the Old English Dictionary:

Donua

indecl. f. The river Danube; Danŭbius = Δανoυtonos;βιos :-- Súþ óþ Donua ða eá, ðære ǽwylme is neáh ðære eá Rínes south to the river Danube, whose spring is near the river Rhine, Ors. 1, 1; Bos. 18, 24, 29. On óðre healfe ðære eá Donua on the other side of the river Danube, 1, 1; Bos. 18, 31, 43. donua