What are the restrictions for selecting a business name in Estonia?

In Estonia, there are several restrictions for choosing a business name:

• It must include a reference to the legal form of the company, like 'OÜ' or 'osaühing' (private limited company) at the beginning or end.
• For sole proprietors, it should include the first and last name of the proprietor.
• It can't contain the name of a person not involved in the business.
• It must be distinguishable from other business names in the Estonian business register.
• You can't use a protected trade mark without the owner's consent, unless it's unrelated to the trademark's field of protection.
• The business name and field of activity should not conflict.
• Names of state or local government bodies cannot be used.
• For branches of foreign companies, it must include the company name and 'Eesti filiaal' (Estonian branch).