The
Dakota name for the river is
Watpa waḳaŋ (Spirit(ual)/Mystic River), after
Mille Lacs Lake (
Mde waḳaŋ, Spirit(ual)/Mystic Lake). In 1702, d'Isle's map recorded the name of the river as
Riviere des Mendeoüacanton (River of the
Mdewakanton). On the "Carte représentant le
Messisipi entre le 49e d. et le 42e d. ou aboutit la rivière
Wisconsing lac Supérieure, lac des Illinois et lac
Alemepigon" map (c. 1730), Rum River is recorded as
Rivière de S. François ou des Nadouessioux (St. Francis or Sioux River). On the 1733 Henry Popple map, the Rum River is shown as
R. Nendivaocanton. Upham notes that both Carver in 1766 and Pike in 1805 found the name "Rum River" in use by English-speaking fur traders. However, the 1778
Mitchell Map by John Mitchell records the river as
Fiume del Lago (River of the Lake), with Samuel Mitchell reproducing the map in 1880, with the river recorded as
Lake R.; Mille Lacs Lake, though, was recorded in the reproduction as
Red Lake or
Mustiacalsan ("
Mustiacalsan" being a mis-recording of "
Miſsiſacaigon").
Henry Schoolcraft in his
Narratives in 1820 records the Rum River by its Ojibwe name
Missisawgaiegon. By 1832, Tanner's map recorded the name of the river as
Missisagaigon or
Rum River. Today, two different
Ojibwe names can be found for this river: one indicating the lake of its origin (''Misi-zaaga'igani-ziibi
, Grand Lake River) and the other reflecting the English (Ishkodewaaboo-ziibi'', Fire-water River). Due to changes in the Dakota language, two slightly varying river's name appears as well:
Watpa waḳaŋ representing the historically recorded name, and
Wakpa waḳaŋ reflecting the current name. == Naming controversy ==