@Dranza:
Did you know that the blonde gorosei, killer, Bellamy and Jack all have no eyebrows? It's because when Judge exiled them he told them to never let anyone know that they're his kids, except the gorosei dude, that one is his brother. They all had swirly eyebrows and it's linked to swirly pattern on devil fruits and their ancestral links go as far back as being linked to the devil himself.
I can back all of this up with evidence straight from the panels and SBS's. In fact, do people think it's a mere coincidence that Sanji has the theme of the Devil when he uses Diable Jambe?
Oda even confirmed that one of Killer's favorite hobbies is cooking. Since Sanji was criticized so much for cooking like his mother, Killer, Bellamy, and Jack must have been exiled due to defying Judge's wishes and not behaving like proper royalty.
But wait, there's more! Could it also be possible that the Vinsmokes are related to the Donquixote family due to also having blonde hair? Due to their royalty and access to Mariejois, the Vinsmokes may have also been Celestial Dragons. How can this image of Sanji be called a coincidence when paired alongside Doflamingo and Rosinante:
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Doflamingo wanted SMILEs. Caesar makes SMILEs from Bloodline Elements. Judge used Bloodline Elements to genetically enhance his children. Thus giving Reiju, Ichiji, Niji, Sanji, and Yonji curls like Devil Fruits. It all comes full circle. So poetic.