1B9 glyphs from: Maya Hieroglyphic Database: Catalog. Drawings by Matthew Looper, except codical examples by Martha Macri.

1B9 #1 yi (syllable)

1B9 #2 yi (syllable)

1B9 #3 yi (syllable)

1B9 #4 yi (syllable)

1B9 #5 yi (syllable)