\[Thorn] (Mathematica Character Name)

Unicode: 00FE. Alias: Esc thn Esc. Letter. Included in ISO Latin-1. Used in Icelandic and Old English.

\[UAcute] (Mathematica Character Name)

Unicode: 00FA. Alias: Esc u' Esc. Letter. Included in ISO Latin-1.

\[UDoubleAcute] (Mathematica Character Name)

Unicode: 0171. Alias: Esc u'' Esc. Letter. Included in ISO Latin-2. Used in Hungarian.

\[UDoubleDot] (Mathematica Character Name)

Unicode: 00FC. Alias: Esc u" Esc. Letter. Included in ISO Latin-1.

\[UGrave] (Mathematica Character Name)

Unicode: 00F9. Alias: Esc u` Esc. Letter. Included in ISO Latin-1.

\[UHat] (Mathematica Character Name)

Unicode: 00FB. Alias: Esc u^ Esc. Letter. Included in ISO Latin-1.

\[UnderBrace] (Mathematica Character Name)

Unicode: FE38. Alias: Esc u{ Esc. Letter-like form. Extensible character.

\[UnderBracket] (Mathematica Character Name)

Unicode: 23B5. Alias: Esc u[ Esc. Letter-like form. Extensible character.

\[UnderParenthesis] (Mathematica Character Name)

Unicode: FE36. Alias: Esc u( Esc. Letter-like form. Extensible character.

\[UndirectedEdge] (Mathematica Character Name)

Unicode: 0F3D4. Aliases: Esc ue Esc. Infix operator with built-in evaluation rules. uv is by default interpreted as UndirectedEdge[u,v].