Ÿ
is a Latin script character composed of the letter and the diaeresis diacritical mark.
Usage
French
It occurs in French as a variant of in a few proper nouns, as in the name of the Parisian suburb of L'Haÿ-les-Roses and in the surname of the house of Croÿ.Hungarian
It occurs in a few Hungarian names as well, such as Lajos Méhelÿ and Margit Danÿ.Tlingit
In Tlingit, ÿ represented the sound, but is not used today as the sound has merged with and.Paunaka
In Paunaka, this letter represents the vowel.Other
uses 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.
In Unicode
As a diaeresis is never used on the first letter of a word and all-caps text typically omitted all accents, there was assumed to be no need for an uppercase when computer character sets such as CP437 and ISO 8859-1 were designed. However much software assumes that conversion from lower-case to upper-case and then back again is lossless, so was added to many character sets such as CP1252, ISO 8859-15, and Unicode. This phenomenon also arose for the German eszett.