is a Latin P with a diacritical tilde. It is or was used as a grapheme in some languages of Vanuatu, such as North Efate, South Efate and Namakura, to represent a. It is also used in the Yanesha language.
The letter was introduced by missionaries and has been in use for over a hundred years.
In Bislama, the lingua franca of Vanuatu, p with tilde is called snekpi "snake-P".
In Old English, it was used as a contraction of the penny, as in ⋅cxx⋅ p̃..

Computer encoding

encodes p with tilde with a combining diacritical mark, rather than a precomposed character. As such, the tilde may not align properly with some fonts and systems.
In standard HTML code: majuscule P̃, minuscule p̃.
The Unicode HTML hex code is: minuscule p̃, majuscule P̃.
The Unicode HTML decimal code is: minuscule p̃, majuscule P̃.