Wondering if any one knows what the new name for Butterfly Legend (Northern VA agency) is.

BL got shutdown by LE (2019ish I think). I know some of the providers that used to tour the DC area with them showed up at AG but I don't think that is BL reincarnated.  

 
Are you asking hoping that your screening there will transfer to a new agency?

 
You have a lot of choices in the area now, perhaps more than when BL was in operation, so other than hoping you don't need to reapply for membership just pick a few (or all) of the others.