Xanthopoulos

Usage: Greek

Means "son of Xanthos". Xanthos is a Greek name meaning "yellow" or "fair hair".

Xun

Usage: Chinese

It's derived from the Chinese first name Xun meaning "fast".

Xylander

Usage: Greek

From Greek xylon, which meant "wood" or "forest", and andros, which meant "man". This surname is the Greek translation of the Dutch surname Houtman. People used to translate their surnames to a foreign language in the 14th to 16th century. And in this case, a person with the surname Houtman translated his/her name into Greek: Xylander.