囟 is a Chinese hanzi, listed here under the keyword “top of the head”. It is built from 丿 (line), 囗 (erect) and 㐅 (sheaf). It appears as a component in 2 other characters in this index.
On KumiJi Glyph Explorer, open the parts search and type “line” + “erect” + “sheaf”. 囟 is among the results, together with every other character containing the same shapes.
Open 囟 in the interactive kanji search
to expand every part down to its smallest pieces, add your own names and mnemonic stories,
or search for other characters by their parts.