@tyler @ned

OP was asking for a real example of a queen from Africa and I think the queen of Sheba may be a real candidate but there is no way to verify, but the queen of Sheba is referred to as the "queen of the south"

"1 And when the queen of Sheba heard of the fame of Solomon concerning the name of the LORD, she came to prove him with hard questions.

2 And she came to Jerusalem with a very great train, with camels that bare spices, and very much gold, and precious stones: and when she was come to Solomon, she communed with him of all that was in her heart.

3 And Solomon told her all her questions: there was not any thing hid from the king, which he told her not.

4 And when the queen of Sheba had seen all Solomon's wisdom, and the house that he had built," 1 Kings 10:1-4