Special needs brother in law

Maybe that is a good option!

You are right when it comes to a person with autism. Take into account how long the ceremony will be because that will tell you if he is able to handle his position of a groomsman. Also I do agreed with Karen that depending on the level of maturity noise and crowded places can determine whether it will effect him or not. you and your fh knows him best as how to handle the situation. Go on what you know about him and what he can handle. That will determine whether he can handle it or not. Abby has a good idea.

Please dont' call him an "honorary groomsman" - it's very condescending. He's a groomsman regardless of whether he stands up the whole time (or at all) during the ceremony. Make sure he knows where he can sit if he needs to.