Quote Originally Posted by Throbert McGee View Post
... but Бог is an exception -- the "Г" is pronounced as a "voiced" letter "Х" (a sound for which there is no letter in the Russian Cyrillic alphabet!). And the vocative Господи! also begins with a "voiced Х" sound -- not a "Г" or "К", and not a normal unvoiced "Х".
It's rare for me to hear Бог with "voiced" Х, usually we say "Бох", with "unvoiced" one, for example "Да Бог его знает! (Да Бох ево знаит!"). But in "Одному Богу известно, когда это произойдёт!" г is g. Господи with the "voiced" X sounds a bit просторечиво, I myself say it Gospody, with usual g.