Sēo '''Donua''' ({{Lang-la|Danuvius}}, of Iraniscum wordeƿorde ''*dānu'' þæt mǣnþ "ēa" oþþe "strēam", on Ealdcrēcisce Ἴστρος ''Istros'') is sēo lengeste ēa in þǣre [[Europisc Gesamnung|Europiscan Gesamnung]].
Hire fruma is in þǣm [[Sweartweald|Sƿeartƿeald]]e in [[Þēodiscland]]e, of twǣmtƿǣm lytlum ēam: sēo Brigach and sēo Breg. Hīe mētaþ be [[Donaueschingen]]; þēos geānlǣhte ēa is sēo Donua. Hēo flēwþflēƿþ ēast 2850 km (1771 mīla), þurh missenlica Europisca hēafodbyrg, and flēwþflēƿþ in þǣm [[Sweart sǣ|SweartanSƿeartan sǣ]] þe is æt þǣm Donuamūðan in [[Rumǣnia|Rumǣnie]] and [[Ucrægna]]n.