Ÿ

ÿ is a Latin script character composed of the letter ⟨y⟩ and the diaeresis diacritical mark. (An uppercase form, Ÿ, has a codepoint in some coding schemes (including Unicode) but is not known to be used in any orthography.^{[citation needed]})

It occurs in French as a variant of ⟨ï⟩ in a few proper nouns, as in the name of the Parisian suburb of L'Haÿ-les-Roses (French pronunciation: [laj le ʁoz] ^ⓘ) and in the surname of the house of Croÿ [kʁu.i].

It occurs in a few Hungarian names as well, such as Lajos Méhelÿ and Margit Danÿ.

In Tlingit, ÿ represented the sound [ɰ], but is not used today as the sound has merged with [j] and [w].

In Paunaka, this letter represents the vowel [ɨ].

IPA uses ⟨ÿ⟩ to transcribe the close central compressed vowel, a type of vowel sound used in some spoken languages. The Cocama language also uses this letter.

The character has also found use as a metal umlaut.

The lowercase ÿ has the Unicode code U+00FF, or 255, making it often appear when binary files are opened as text files.