Wis. Stat. § 851.75: Register in probate may be appointed deputy clerk.

With the written approval of the chief judge of the judicial administrative district, the circuit judges for the county may appoint the register in probate a deputy clerk. Appointments by the circuit judges under this section shall be revocable by the circuit judges, subject to the approval of the chief judge, at pleasure. The appointments and revocations shall be in writing and shall be filed in the clerk’s office.