I'd check the axle shaft as well, if you have the cv style (which I think most zjs have) then I'd check to see if the boot on the shaft is torn like this boot
I'm guessing you jacked the wheel up and pushed at the 6 and 12 o' clock to determine the wheel was wobbly? If so then I'd start with replacing the hub and check the boots, if the boots are okay then just do the hub, if they're torn then do both.
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