(1) The surname of a limited partner shall not appear in the partnership name, unless (a) It is also the surname of a general partner, or (b) Prior to the time when the limited partner became such the business had been carried on under a name in which his surname appeared. (2) A limited partner whose name appears in a partnership name contrary to the provisions of paragraph one is liable as a general partner to partnership creditors who extend credit to the partnership without actual knowledge that he is not a general partner.
