Article 4 of the Saudi Trade Names Law

This article sets out the source and components of the trade name:

• Source of the name: it may be taken from the merchant's personal name, or from a distinctive name that he chooses, or from both together.
• Arabic components: the name consists of Arabic or Arabized words, or of Arabic letters or numbers, or of one or more of them.
• A language other than Arabic: the name may also consist of words, letters or numbers in a language other than Arabic, or of one or more of them.

The third paragraph refers important details to the Implementing Regulations, including:

• The rules on a language other than Arabic in the trade name.
• The way the trade name is displayed in the Commercial Register.
• The rules on reserving and entering the name "Saudi Arabia" (al-Saudiyyah), the names of cities, regions and public places, and family names as trade names.

So the article neither prohibits these names nor permits them absolutely, but leaves their rules to the Implementing Regulations; anyone who wishes to use the name of a city, a family name or the word "Saudi Arabia" (al-Saudiyyah) must refer to the Implementing Regulations.

This article is connected to Article 3, which requires every merchant to adopt a trade name and enter it, and to Article 5, which regulates how an application to reserve or enter the name is submitted to the Registrar.