If Jay is connected to Egghead due to his role in science, then what islands would the other Elders be connected to based on their roles?
My guesses:
Topman Warcury - Justice (marine islands like Enies Lobby, Impel Down, etc.)
Ethanbaron V. Nusjuro - Finance (wealthy, economic islands like the Country of Gold, aka Wano)
Marcus Mars - Environment (nature-centric islands like winter islands, sky islands, or Fish-Man Island)
Shepherd Ju Peter - Agriculture (production-centric islands like Water 7)
Jaygarcia Saturn - Science and Defense (scientific, medical islands like Egghead)