A2 and B2 are Alley Agates. From the 1940's.
All four marbles are in the general category of "West Virginia Swirls". There were about 10 companies in West Virginia which made similar-looking swirls. (There was also a company in Missouri which had WV machines and usually is included in this group because it's hard to distinguish.)
Sometimes the swirl pattern or color combos or size are distinct enough that we can nail a company down, or at least narrow down the choices, but it's tricky. So often the ID answer will be "WV Swirl" and we have to leave it at that.
There's also some possibility of a swirl turning out to be Christensen Agate, which is not a WV Swirl. Your first marble, A1, I said was a WV swirl, but I can't swear it's not Christensen. Just odds say it's not. Maybe someone else will feel more positive about it.
My first thought is Champion for B1, but maybe Alley. (So to be safe, sticking with "WV Swirl".)
Swirls like A1 are sometimes also/instead lumped into the "Transparent Swirl" category. That covers both the Christensen and Alox possibilities as well as all the WV choices.