The name Spodnje Roje literally means 'lower Roje'; the elevation of the village is about 3 meters (9.8 ft) lower than that of neighboring Zgornje Roje (literally, 'upper Roje'). The two villages were attested in historical sources in 1350 as Roͤdein in 1350, zu Royach in 1402, and zu Rayach in 1436, among other spellings. The name comes from the common noun roja 'ditch, drainage canal', referring to a damp meadow or field drained for cultivation. The noun was borrowed into Slovene from Friulianròja 'drainage canal'.[3]