Form 21.01 - Affidavit in Support of Application for Change of Name of Adult (MUST be notarized PRIOR to filing at Court. Complete all fields on the Application for Change of Name of Adult (Form 21.0), the Birth Certificate.You can use this form to request a legal name change in Cuyahoga County Probate Court. Learn more about changing your name in Ohio. Attorney Portal to those practicing law in the Cuyahoga County courts. The E-Filing module allows an attorney or an authorized user with a valid account to file. You can obtain these forms from your local probate court or online. The answer generally is "no" — Notary commissions are not transferable between states. You go to the courthouse and fill out a form, showing your current name and the name you want, plus your reason for changing it. Complete the application in its entirety and sign it.