Please identify this ceiling texture
OK, i can identify it.
It is That ugly texture for the 70's that the neighbor lady talked my mom into letter her put on my bedroom ceiling.
She also did one on the living room ceiling that was like a swirl, she would dip a brush in mud, stick it on the ceiling (poke the ceiling)  and turn it before pulling straight away from the ceiling.
I think she had stock in the mud company because it uses a lot of mud.
I also had red white and blue shag carpet in 1976. And you wonder where i get my warped sense of humor.

Which stipple brush will match my pattern?

One possibility is they used a straight brush, loaded it with mud and poked the ceiling, pulled straight back and then turned the brush and poke and turned the brush and poked and tur- - - ked.