If Karen's 128 crayons were twice as many as were in Beatrice's box, there were 128/2=<<128/2=64>>64 crayons in Beatrice's box.
And since Beatrice's box contained twice as many crayons as were in Gilbert's box of crayons, then Gilbert had 64/2=<<64/2=32>>32 crayons.
And since Gilbert had four times as many crayons as Judah, then Judah had 32/4=<<32/4=8>>8 crayons.
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