Buddism isn't really a religion, because they do not necessarily worship Buddah. It's considered a system of beliefs.
Maitreya is a Sanskrit word referring to the Buddha who is to come. He is known by different terms in other traditions, but the idea is common to all mainstream Buddhisms.
In a church
INDIA
nepal
temple
India.
It originated in the Jewish religion.
Zoroastrianism
Greek mythology which is technically a religion
Zen
people
MESOPATAMIA