Religion........, Number of followers (in millions)...., Founded
Christianity..................2,420................................................Middle East
Islam............................1,800................................................Middle East
Hinduism.....................1,150...........................................Indian subcontinent
Buddhism 520...........................................Indian subcontinent
Major religious groups - Wikipedia
https://en.wikipedia.org/wiki/Major_religious_groups
Of course about half the Jewish population was murdered. But you can add that to the top two religions above.
Christians were murdered in their millions as well