Be careful. (Score 1)

If the domain is yourlastname.com then you have a legitimate claim on the domain and should not be concerned about trademark infringement or being accused of domain squatting. Check over at estibot.com and see what the potential value is. lastname.com,s are a fairly rare commodity and can command offers in the xx,xxx dollar range. If you do decide to sell, consider using a marketplace like sedo.com to make sure that you are protected in the transaction.