niðr

From Proto-Germanic *niþer, whence Old English niþer, Old High German nidar.

niðr (not comparable)

2. down

• Icelandic: niður
• Faroese: niður
• Norwegian: ned; (dialectal) ner, ni, nid
• Old Swedish: niþer, niþ, nedher, nedh
  • Swedish: ned, ner, neder
• Old Danish:
  • Danish: ned
• Old Gutnish: niþer

From Proto-Germanic *niþjaz, cognate with Gothic 𐌽𐌹𐌸𐌾𐌹𐍃 (niþjis).

• ᚿᛁᚦᛧ (niþʀ) — nominative singular

niðr m

2. kinsman, relative
   • 9th c., Þjóðólfr of Hvinir, Ynglingatal, verse 4:

     Ok Vísburs / vilja byrði
     sævar niðr / svelga knátti

     And the kinsman of the sea [FIRE] / was able to swallow
     the ship of will [BREAST] / of Vísburr

3. ancestors; deceased men belonging to the same clan

   iðja várra niðja ― the profession of our ancestors

4. son

• Icelandic: niður
• Old Swedish: niþiar m pl
• Old Gutnish: niþi

• Zoëga, Geir T. (1910) “niðr”, in A Concise Dictionary of Old Icelandic, Oxford: Clarendon Press, page 312; also available at the Internet Archive