Easy, there is a plugin that can 'flip'
selected Authors (and a lot more useful things)
Quality Check Plugin:
Fix: Swap Author Fn Ln <> Ln, Fn
Right click Preferences: Get Plugins : not installed: <select)
Is the easiest way to add ANY official (found here at MR, Calibre Plugins) recognized PI
I also use the FIX fo format Author initials so they are all the same way (My preferred way
)