The automatic transcript hears Doctor Berry's name variously as Birdie, Burrell, Rivera, Billy and similar rubbish.

That is actually useful.

It tells us the recorder is hearing something that doesn't map comfortably onto an English survey.

With what your dad has now told you, surname Berry, pronounced approximately Berre Berre, I would stop looking for an English Berry, a transliterated transliteration such as berry, berry, ee, berre, berry, berry, berre, or something similar is much more plausible than berre, because Persian to Latin transliteration doesn't normally use English spelling conventions like the really valuable thing next time isn't asking your dad for the English spelling.

Ask him how is Doctor Barry's surname written in Persia?

One photograph or WhatsApp rendering of the Persian spelling would settle the transliteration immediately.

There's another fascinating historical connection.

Garabagi himself was born in Tabriz in 1918.