**linna, a misreading for lenna- (q.v.) that appears in the Etymologies as printed in LR. See VT45:27.
Quenya
-linna
-linna
linna
linna
lin-
verb. sing
[lin- (2) vb. "sing" (GLIN, struck out)]
lindë-
verb. sing
lindë- vb. ?"sing" (LT1:258; in LotR-style Quenya lir- or #linda-)
lir-
verb. to chant
lir- vb. "to chant" (1st pers. aorist lirin "I chant, I sing") (LIR1, GLIR)
-linna or -linnar ending for partitive pl. allative (Plotz); see -li