It is a Spanish surname, probably a deformation of mudejar, derived from mudayyan, Arabic word meaning domestic or domesticated. The Mudejar were Muslims who remained in Christian lands are allowed to continue with their religion, their language and customs. They were lowly, peasants related to irrigation or specialized craftsmen. Over time the conditions of tolerance were disappearing and the fear of the Inquisition made them change to the name.
* Only one "like" per meaning and day, the more "likes" the meaning will appear higher in the list