Find out how to change your middle name on Facebook. 1. Sign into your Facebook account. Go to "Settings" on the top right of your main Facebook home page. 2. From there click on "Account Settings". Find where it says name and click on "change". 3. Enter your middle name and click on "Change Name". 4. Read the legal paragraph and be sure to check the box that says "I confirm. " then click on "Confirm Request".