I made this post almost exclusively so that @GodUsoland wouldn't be the most active on this wiki.

But I might reupload a Kaido theory cos it occurred to me.

Oars and Little Oars Jr are part of a race called Ancient Giants. They used to be big enough to pull continents around but have shrunk in size since.

That's why Little Oars Jr is many times smaller than Ace.

Kaido is many times smaller than Little Oars Jr. but has the same horns as them and so probably has some AG DNA. He is probably half new age AG and half normal giant since he has intelligence.

The numbers have the same horns so I think are descendents of AG too, or some offshoot.

The skull on the island has the horns too and so I think this race has connection to Wano.

Maybe Oda's big reveal will include theor race ..... only time will tell