The word G. octha “knee” appeared in the Gnomish Lexicon of the 1910s (GL/62), clearly a cognate of ᴱQ. okka “knee” (QL/70).
Neo-Sindarin: In the VQP (VQP), Sami Paldanius proposed adapting this word as the neologism ᴺS. ogod “knee”, by analogy with the revision of G. leptha “finger” to [N.] lhebed.
occa ("k") noun "knee" (QL:70)