Mich. Comp. Laws § 500.7606

Sec. 7606. When an insurer is consolidated or merged under the provisions of this chapter, the name of the insurer may be retained for a period of 5 years after the effective date of the consolidation or merger for the use of the resulting insurer and no other domestic or foreign insurer shall be authorized to do business under such name or any other name that closely resembles such name during the 5-year period.