Who is Yahweh?
This is the English pronunciation of the God of the Bible. While there is debate on how to pronounce Tetrogrammaton (????) one that many agree that it is close to Yahweh and that is what we use normally.
Who is Yeshua?
Yeshua is the Hebrew name for who most people know as Jesus. He is the Messiah that is proclaimed in the Bible.
What is Passover?
Passover is a Feast of Yehweh that was first observed when the people of Isreal were brought out from the land of Egypt, and then observed as a memorial for all time after that. Yeshua was put to death as a payment for our sins on Passover and became our covering for the final judgement.