The details shared here apply to the most recent versions of our themes. To keep your theme up to date, check out this helpful document.
In order to change the "Vendor" text to say Brand (or whatever you'd like), you'll need to head into the theme's language files.
Step 1: From the Shopify Admin, head into Sales Channels > Online Store > Themes.
Step 2: Click the Actions button for the theme you want to customize, then select Edit Languages.
Step 3: From here, you can edit all of the text that is displayed throughout the layout of the theme, including the Vendor text which can be changed to Brand.