The 5 Elders have their names revealed - as well as glimpse of their Devil Fruit powers.
One Piece: Who Are The Gorosei? - Abilities and Powers of the Five Elders, Explained
Theory about the 5 elders : r/OnePiece
Chapter Secrets – Chapter 1073 in-depth analysis – The Library of Ohara
Chapter Secrets – Chapter 1086 in-depth analysis – The Library of Ohara
One Piece's chapter 1086 reveals the names of Gorosei - Dexerto
One Piece chapter 1086: How the Five Elders' names tease their power level
One Piece 1083 Reveals [SPOILER] Met The Five Elders
One Piece Reveals The Five Elders' True Appearance And Powers
Five Elders (Gorosei) in One Piece: Names and Powers
One Piece: Everything to know about the Five Elders