Yahweh, originally part of Canaanite pantheon
Exodus from Egypt adapted from Cushite myth
Cherubs in Ezekiel adapted from Assyrian mythology
Creation and flood myths adapted from Babylonian and earlier Sumerian myths
The devil as a specific character (rather than ‘satan’ as a generic concept of opposition) from Persian religion
Nebuchadnezzar’s dream about a tree contains elements adapted from a Babylonian legend about Nabonidus
The ‘Word’/logos from Greek philosophy
But Christmas and Easter are apparently a bridge too far. 🤦♂️🤣