yichusdik- I knew that feivel was a derivative from russian-and meant light (fabian) but you brought the real origin to life ! wow- from phoebus- greek!
I also pay my respects to your whole mishpocho- the bostoner rebbe zz’l and his sons are, of course, also descendants from the “ba’al haflo-oh” who, if anyone would remember, was the Rov in frankfurt an main before the yekkes took over ! ( just some levity)