Harnen

noun. South(ern) river

har (from harad “south”) + nen (“water, lesser river”)

harnen

place name. *South Water

A river in southern Middle-earth (LotR/1045), a combination of the prefixal form har- of harn “south” and nen “water”.

Conceptual Development: The name N. Harnen appeared on draft maps for the Lord of the Rings from the 1940s (TI/309).

Elements

Word	Gloss
harn	“south, southern”
nen	“water; lake, pool; (lesser) river, water; lake, pool; (lesser) river, [ᴱN.] stream”

Harnen

Harnen

Harnen seems to mean "South Water" in Sindarin.