I've obtained some yellow colored wire nuts that have the words "Hi-Y"
and "22-10" in small letters on the top. I would like to know who
manufactured them so I can look up what the minimum and maximum number
of wires of a given size they will hold.

I do know that Ideal Industries' red colored wire nuts have the words
"BUCHANON" and "B2" in small letters on the top, so I don't think mine
are made by Ideal.