Why do they name god god?

Answer 1

The word 'god' as a generic word comes to us from the Germanic languages and simply means 'the supreme being' or 'diety.' When capitalized as 'God' it is in reference to a specific one, though which one depends on which religion you are discussing.

Most religions have a more formal name; God being used more as a title or nickname.

For example according to the King James Bible, God's real name is: YHVH (the Hebrew language that it is derived from does not use vowels). The accurate pronunciation of the word is thus debatable and often changed depending on regional dialects. (Yahweh, Yahova, Jehova and many other variants abound)

For simplicity the name YHVH is mentioned only in the introduction written by the translators and the rest of the book is translated using a translated adaptation as God, using the Germanic definition of 'the supreme being' and capitalized to show it is in reference to a specific one, thus making God a proper noun rather than a generic one (god).

Other religions (or sects within a religion) may use the term God to reference a different naming or spelling of either the same or a different god.

****************

When one speaks of God, it is generally the Father who is referred to; that is, Elohim. It is one of the titles by which he is known.