I mean they’re curly just like his kids
They are like Nika's which would be a mere coincidence except for...
In WCI, Oda took a lot of effort into hiding Judge's eyebrows.
1. Helmet
2. Shadowed when sleeping.
3. Bandaged when damaged.
4. Corrected the anime when they gave Judge no eyebrows his first appearance to making sure he had ones.
Notice he didn't let them be seen till after Nika was revealed. Now on the cover story he shows them.
You can't ignore there is something there he is not saying yet.