Wis. Stat. § 180.1907: Corporate name.

The service corporation may bear the last name of one or more persons formerly or currently associated with it. A service corporation may adopt a name which does not include the surname of any present or former shareholder. The corporate name shall end with the word “chartered” or “limited”, or the words “service corporation”, or the abbreviation “ltd.” or “S.C.”. A service corporation in existence on January 1, 1991, need not change its name to comply with this section.