No.
A1 is a very unknown band nowadays, but this keyboard player who played in it is known by virtually everyone that's remotely into prog. I must say, he was only in the band for this one album, though he was featured on the one before as well.
A2 is an unknown band, one you've only heard of if you have heard of them, I figured this would be one of the last to go.
B2 is relatively unknown, but does have a following and is mentioned quite often on this forum.