This rare kanji has no clear standalone meaning. Treat its meaning as uncertain.
驎 combines 馬 (horse) with 粦, which likely contributes the sound. The exact historical development is uncertain.
A horse 馬 with a mysterious right side 粦. Since the meaning is unclear, picture a rare, spotted horse whose name has been lost.
For リン, imagine a rare horse named Lynn: Lynn -> リン, and this horse is so rare its meaning is forgotten.