Note 365 — THE HOG HATH LOST HIS PEARL. ACTUS PRIMI, SCENA PRIMA.
Reading edition
If this be not a corrupted, it must be an affected, word, coined from the Latin word niteo, to shine or be splendid. He was admired by those who shone most in the article of dress.—Steevens.
So in Marston's "Satires," printed with "Pygmalion," 1598—
"O dapper, rare, compleat, sweet nittie youth! Jesu Maria! how his clothes appeare Crost and re-crost with lace," &c.
Niters, however, may be a corruption of niflers. Chaucer uses nifles for trifles. See "Sompnour's Tale," Tyrwhitt's edit. v. 7342—
"He served him with nifles and with fables."
[Knights would be a bold emendation, and perhaps not very successful.]