Ok, the only lead I have now is Hausa and Mattatu, so I spent the last couple of days doing research on this, and I found some things. What we know as Mattatu, apparently showed up everywhere during the ages. Englishmen called him Grim Reaper, the Poles called him Śmierć, Lithuanians called him Giltine, so on and so forth. I don't know if it really is him, but all of these characters almost match his description completely, with several exceptions. Just why is Mattatu hiding under all those robes and a skull mask? The meaning of his name is 'dead', so is he truly dead? Or is he the angel of death? One couldn't know, but I feel all of these creatures/things/whatevers have deep roots, and that they've been stalking people since the dawn of men. The Master? Schlankwald, Grossman, Fear Dubh... There is even a tale I've heard of a Rake-like creature: when I stayed at a friend's in Canada, they told me a story of a creature of great intelligence and evil: the Hossholor. The Norse, who first discovered North America, settled in a location in Canada they called Vinland. They established a settlement there, and things went rather smooth, until the Hossholor came. It was a small grey man-like clawed creature, who raided the settlement and killed men, raped women, and took children. The Norse tried to fight it off, however, all their attempts angered the creature even further. A hero emerged, a man known simply as Calder, who claimed he could fight the Hossholor and put an end to his hostilities. As the night came, Calder waited for the monster. He failed to show that night. Calder waited there for seven days, until the Hossholor, hungry for flesh, attacked. They fought until dawn, however, Calder saw that he couldn't beat the creature. No matter how deep he cut the Hossholor, the creature continued fighting with even more ferocity. Soon, Calder saw there was no stopping it, so he yelled to his woman, Brenda, to quickly gather the people and escape back to Iceland. He continued fighting the Hossholor until evening, when everyone left. However, what Calder didn't know is that Brenda didn't want to leave him. Just as Calder decided to give up and die, Brenda stormed at the Hossholor with a flaming torch. The Hossholor was set on fire and rushed for water, which Brenda and Calder used to run for the ship, which was backing off. Somehow, they reached the ship and returned safely to Iceland.
That's it for now. I decided to stay in Florida for the time being, the temperatures elsewhere are not to my liking. I'm going to try and dig up more until the next update.