Jaelyn or Jaelynn, and its masculine equivalent, Jaylin, is an American given name. The meaning of the name Jaelyn is "may (the name bearer follow/heed/seize by the heel/watch/guard/protect”, "Supplanter/Assailant", or "May God protect", and the origin of the name is American. It is a contraction of the female given name Jacqueline.[1] People with the name include: