Project Mega Evolution: Umbreon

Pokémon Go Eevee evolution names guide - Polygon

Pokemon GO - Eevee naming trick returns for Espeon and Umbreon

Pokémon Fans Vote Umbreon & Espeon As Favorite Eeveelutions

133 - 197 Umbreon Line by InProgressPokemon on DeviantArt

How To Evolve Eevee Into Umbreon & Espeon In Pokemon Legends Arceus

Eveelution Umbreon by Alpha-mon.deviantart.com on @deviantART

I named my eevee to evolve it into umbreon, but the evolution button still has a question mark, will it evolve into umbreon if I press evolve? : r/pokemongo

Umbreon Espeon Eevee - Obsidian Flames - Pokemon Evolution 3 Card Lot - 086/197-130/197 : Toys & Games

If you haven't used the Eeveelution naming trick, nicknaming Eevee will make the Evolve button show the Eeveelution. (Works for Espeon/Umbreon too) : r/TheSilphRoad

Eevee Evolution: All Eeveelution methods Pokemon Scarlet and Violet