Gunzelin III, Count of Schwerin

Gunzelin III (died 1274) inherited the County of Schwerin in 1228 from his father Henry I, ruling under his mother Audacia's regency. After Bornhöved, the captive Duke Otto I of Brunswick confirmed the fiefs Schwerin held from him. In 1230 he was betrothed to Margaret of Mecklenburg, and married her in 1241.

With his mother he founded Zarrentin Abbey in 1246. On his death in 1274, his sons Helmold III and Niklot I split the county into Schwerin and Wittenburg lines.