After The Flood, Cush (also called Ethiopia, the region south of Egypt, not necessarily within the borders of modern-day Ethiopia) and Egypt, and likely most of the other major nations of Africa, were repopulated by the descendants of Noah's son Ham (Genesis 10:6). The earliest-known part of Africa was referred to as the "land of Ham":
"He sent Moses his servant, and Aaron whom he had chosen. They wrought his signs among them, and miracles in the land of Ham." (Psalm 105:26-27 RSV)
The conversion and baptism of the Ethiopian eunuch, who was a Jewish convert, and who was among the very first Africans converted to Christianity (if not the very first one), is one of the most famous of The Bible:
"So Philip ran to him, and heard him reading Isaiah the prophet, and asked, "Do you understand what you are reading?"
"And he said, "How can I, unless some one guides me?" And he invited Philip to come up and sit with him."
"Now the passage of the Scripture which he was reading was this: "As a sheep led to the slaughter or a lamb before its shearer is dumb, so he opens not his mouth. In his humiliation justice was denied him. Who can describe his generation? For his life is taken up from the earth."
"And the eunuch said to Philip, "About whom, pray, does the prophet say this, about himself or about some one else?"
"Then Philip opened his mouth, and beginning with this Scripture he told him the good news of Jesus."
"And as they went along the road they came to some water, and the eunuch said, "See, here is water! What is to prevent my being baptized?" And when they came up out of the water [see Baptism], the Spirit of the Lord caught up Philip; and the eunuch saw him no more, and went on his way rejoicing." (Acts 8:26-39 RSV)
Fact Finder: Did Moses marry an African (Cushite, or Ethiopian) woman?