Umuiyan

Umuiyan was a Cat and thane of Tevildo the Prince of Cats, the secondary antagonist of Beren and Lúthien.

Beren and Lúthien (2017)
Umuiyan was Tevildo's doorkeeper during the Quest for the Silmaril. When Lúthien came to his master's domain he allowed her in after she claimed to carry a message to the Lord of Cats. He carried her on his back to Tevildo, who became displeased at his thane's foolishness and slowness, which he attributed to aging. This made the cruel Servant of Melko have Umuiyan thrown off the walls due to the latter having outlived his usefulness.

Appendices
"Umuiyan - An old Cat, the doorkeeper of Tevildo"