Yes, it is possible to use a last name as a trademark. A last name, like any other word or phrase, can be used to identify the source of goods or services and can be eligible for trademark protection if it meets the necessary requirements.

In order to be eligible for trademark protection, a last name must be used as a trademark in connection with goods or services and must be distinctive, meaning that it is capable of distinguishing the goods or services of one person or entity from those of another. A last name that is merely descriptive, meaning that it describes the goods or services being offered, or that is generic, meaning that it is the common name for the goods or services being offered, is not eligible for trademark protection.

It is important to note that the use of a last name as a trademark may be subject to certain legal restrictions, such as the right of others to use the same or a similar last name. It is a good idea to consult with a trademark attorney or other professional to assess the potential risks and limitations associated with using a last name as a trademark and to determine the appropriate steps to take to protect your trademark rights.