Sindarin: *Imlad Thôl ‘Valley of Helm’
English: Helm's Deep
References:
Case-sensitive:
German: Helms Klamm ‘Helm's Deep’
References:
Verified:
Deeping / Helm's Deep
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Helm's Deep & The Hornburg
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Helm’s Deep / Helm's Deep,
A refuge of the Rohirrim.
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