My last name is roughly pronounced as /Qobaadi/.
The earlier forms of Ghobad was "Kuaz", then it turned to "Kuad", then "Kobad" and then "Ghobad".
Some languistics believe that, this word come from a language in the north of Iran. Perhapse Siberian language. The word Kuaz means "The King".

Historically, King Ghobad was the nineteenth Sassanid king of Persia, reigning from 488 to 531.