Assuming you mean Jewish gods, the Jews are monotheistic, that is they worship only one God. The God of Abraham, Isaac and Jacob (the patriarchs of Judaism) is known as YHWH (pronounced in modern times as Yahweh or Jehovah, though no one knows exactly how His Name should be pronounced as Hebrew uses no vowels and the Jews will not pronounce the Name deeming it too holy. Also there is no "J" sound in Hebrew, so the former, rather than the latter is the more likely pronunciation).
No, they're Christian
The ancient Greek Gods did not have second (or family) names.
Gods from Greek Mythology:AphroditeApolloArtemisAthenaDionysusHeraHermesPoseidonZeus
yes
Around 0.4%.
Romania hasn't pagan gods.
roman gods? like Cupid,Neptune,and Jupiter
The Greek gods have 2 names because they are known in both Greek AND Roman mythology, only in differant names.
Lady Gaga isn't Jewish.
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