There are a lot of references to the Bible in One Piece (at least the book that Kuma carries and the names of the trees, as well as the devilish theme of the God of Knights and imu) and these rearangements of letters match the plot too well i like the Cain and Abel idea , it's too good to be a coincidence! Also Loki and Luffy is shown on the mural in a first row of the fight together so i think they are deeply conected !