Marwan al-Baghdadi ("Marwan of Baghdad") was the alias used by a member of a renegade Crosstimers' clique who established himself in late 21st Century Muslim Madrid in a backward alternate, and engaged in extensive slave-trading activities. Possessing a lot of money and speaking perfect Arabic, he arrived in Muslim Madrid in the 2090s and quickly established himself as a successful and influential merchant. This was greatly resented by members of Madrid's old established aristocracy such as Hassan ibn Hussein against whom "al-Baghdadi" often bid in slave auctions.