User blog comment:Firefist553/Unnamed devil fruits/@comment-3181121-20101124155042

For some of the ones you mentioned it is actually unclear whether or they actually possess devil fruits (uruoge, Fossa, Speed Jiru, Rakuyou, Vista), I for one doubt that Uruoge, Fossa and Speed have devil dfs. Speed is just, as his name suggests, fast; Urouge, imo has some weird monk ability that allows him to increase his muscle size (It is called Karma exposure/bleaching karma which further makes me think that); Fossa, maybe got his flaming sword from some sort of dial, or it's covered in something (in the anime he lights it on fire with his cigar which suggests the latter); and Rakuyou probabkly his ball "ate" a dog or a pacman df or something idk; Vista, what makes you think he has a df? I think he is just an excellent swordsman, the flower petals maybe come from his sword or are just a representation of the slash similar to mihawks green lightning thingy.

Whether or not their abilities will be named/explained depends on the matter of their reappearing I think. If they're simple protagonists at another massive war than maybe not, but if they reappear as villains and the SHs have to fight them one on one (Law, Kidd, the admirals etc.) then they'll definitely be named.

Anyway you can find speculation about the possible df names at the speculations page.