Yup, Moloch was a biggie...
"As a god worshiped by the Phoenicians and Canaanites, Moloch had associations with a particular kind of propitiatory child sacrifice by parents. Many ancient sources, presented throughout the article, attest to this (the following citation of Leviticus, and that of Diodorus Siculus, below, are two examples). Moloch figures in the Book of Deuteronomy and in the Book of Leviticus as a form of idolatry (Leviticus 18:21: "And thou shalt not let any of thy seed pass through the fire to Moloch"). In the Old Testament, Gehenna was a valley by Jerusalem, where apostate Israelites and followers of various Baalim and Canaanite gods, including Moloch, sacrificed their children by fire (2 Chr. 28:3, 33:6; Jer. 7:31, 19:2–6)." Wiki