Variant of 瑁

𭹕 is a variant form of 瑁.

The Rites of Zhou describes 瑁 as a jade fitting the ruler placed over the pointed end of a visiting lord’s jade tablet; the carved notches had to match. In the compound 玳瑁, 瑁 appears in the Chinese word for the hawksbill turtle and its shell. These are separate word-level uses.

In a note dated 1063, the Song scholar Ouyang Xiu compares two written forms of a Tang prince’s name: a history gives 瑁, while his mother’s carved memorial stone gives 琩. This is a personal-name spelling dispute, separate from the character’s court-ritual meaning.

Why is this form in a Japanese character registry?

It has a record for its exact written form.

The Japanese MojiJoho registry indexes this form as MJ058045. The registry catalogs detailed character forms for official data, including names that must keep their precise spelling; this explains the form’s record identity.