Xu is:

• a Chinese surname.
• a garden in Nanjing, China.
• a minor character in Final Fantasy VIII.
• a unit of length formerly used to measure the wavelength of X-rays and gamma ray.
• a clandestine intelligence organisation working on behalf of Allied powers in occupied Norway during World War II.
• a coin formerly minted by South Vietnam equivalent to the cent.

Is this little word allowed for playing scrabble?