You and another player character (or a notable or popular NPC in the GM's campaign) become acquainted with each other. Select an appropriate character (work with your DM to determine details)
Razed Your home town or village is razed to the ground by invaders, your home is gone and perhaps even family members. (Work with your DM to detirmine the details)
As an adult you joined a rebellion against the local ruler, if successful you are outlawed, if it failed you escape, with only friends and family knowing your involvement. (Work with your DM to detirmine the details)