[AUCTeX] Symbols in math menu

[Leo]

Dear all,

I wonder if there is a recommended font so that all symbols are
displayed correctly in the math menu (activated by "C-c ~").

I am using "dejavu lgc sans
mono:pixelsize=16:foundry=unknown:weight=medium:slant=r:width=normal"
but the following symbols cannot be displayed properly:

\jmath
\perp
\subseteqq
\Bbbk

See the screenshot of \jmath:

TeX-math.png
Description: TeX-math.png

Thanks in advance.

-- 
Leo <sdl.web AT gmail.com>                         (GPG Key: 9283AA3F)

         Gnus is one component of the Emacs operating system.