Moses
Genesis 4:26BSB·traditional attribution

And to Seth also a son was born, and he called him Enosh. At that time men began to call upon the name of the LORD.

John Calvin Reformed @genevareformer

26. Then began men to call upon the name of the Lord . In the verb ‘to call upon,’ there is a synecdochee , for it embraces generally the whole worship of God. But religion is here properly designated by that which forms its principal part.

Matthew Henry Presbyterian @wholebiblehenry

This is the first mention of Adam in the story of this chapter. No question, the murder of Abel, and the impenitence and apostasy of Cain, were a very great grief to him and Eve, and the more because their own wickedness did now correct them and their backslidings did reprove them.

Commenting on Genesis 4:25-26

Jamieson-Fausset-Brown Reformed @jfbcommentary

men began to call upon the name of the Lord--rather, by the name of the Lord. God's people, a name probably applied to them in contempt by the world. Next: Genesis Chapter 5