Here's a site called World Names Profiler that lets you track your surname (family name, last name, etc.) around the world. I plugged in the name "Lowder" and found that the epicenter for Lowders is here in North Carolina. Interestingly, though North Carolina is the top region for Lowders the top two cities are in the UK, with the very top being Dinas Powys & Penarth, Wales. I don't even know how to pronounce that.