Esau was the twin brother of Jacob in the Bible, and is known for selling his birthright to Jacob for a bowl of stew. In the book of Genesis, Esau is described as the firstborn son of Isaac and Rebekah, and is thus the recipient of the birthright, which includes a double portion of the inheritance. However, when he is hungry and desperate, he sells his birthright to Jacob for a bowl of stew. This transaction is known as the 'Genesis Birthright Seller, ' and the answer to the crossword puzzle is Esau.