My dad has a few family history books. I haven't looked at them in a long time, but I can get them and see if they have more info for you. Would have to look at books, can't remember which one I'm descended from. One of our books says 'from fickert to fiegert'
I'll get him to drop off tomorrow.
My grandfather, Leslie Norman Fiegert, only passed away in 2014 aged 97. His parents (Robert Paul Fiegert & Alvena Christina Nitschke) were farmers in SA and came by wagon to NSW in 1917. I have the wagon in my backyard now.
Will get back to you.