"", or "" (referred to as n-diaeresis or n-umlaut) is a grapheme from several minor extended Latin alphabets, the letter N with a diaeresis mark.

It occurs in the orthographies of Jacaltec (a Mayan language), Malagasy (infrequently used), Tol language, and Cape Verdean Creole, in all four cases representing a velar [ŋ]. It is also used in the Boruca language, Nawdm language (where it only exists as a lowercase letter), Jersey Dutch, and Ocaina language.

In chemistry, N̈ represents a nitrene.