Namaah was Noah’s second wife, and the sister of Tubal-Cain. Ham screwed Noah’s first wife, the mother of Sem and Japeth. This is from the Midrash, if I remember correctly.
That was the Lord God, who is not mentioned in Genesis 1. The Lord God is YHWH/Jehovah, the Rat Bastard.
Cain’s offering was consistent with Genesis 1 and Abel’s was not.