You’ve got options depending on whether you mean “the evolution trick name” or “a fun nickname” for your Eevee that will become Umbreon.

The official evolution trick

In Pokémon GO, there’s a one-time naming trick that guarantees specific Eevee evolutions. To get Umbreon this way, you rename your Eevee “Tamao” and then evolve it. This only works once per account for Umbreon, so people usually save it for a really good Eevee with strong stats.

Cool nickname ideas for an Umbreon

Fans lean into Umbreon’s night/dark/moon theme, and certain names pop up over and over in forum threads and nickname lists.

Night and moon themed

  • Nyx or Nox (linked to the night and darkness in mythology and Latin).
  • Luna or Moon (simple, on-theme, and very popular for both normal and shiny Umbreon).
  • Eclipse or Crescent (great if you like a dramatic, celestial feel).
  • Midnight or Shadow (classic dark-type vibes).

Darkness / shadow vibe

  • Umbra (literally means the darkest part of a shadow, and a fan favorite).
  • Shade or Obsidian (good for a sleek, stealthy Umbreon).
  • Noir (if you like a stylish, slightly edgy name).

Cute or quirky options

  • Stella (star theme, pairs nicely with Umbreon’s ring patterns).
  • Darkglow or Blue Night (nice if you think about the glowing rings).
  • Neon or Glowstick (often suggested for shiny Umbreon because of the bright blue rings).

A quick storytelling idea

If you want something more personal, you can blend a theme with a moment: for example, if your Eevee evolved at night after a long walk, you might call it “Twilight” or “Duskstep” to remember that specific evolution story. TL;DR :

  • For the guaranteed evolution in Pokémon GO: name your Eevee Tamao before evolving.
  • For style: popular Umbreon names include Nyx, Umbra, Luna, Eclipse, Shadow, Noir, Obsidian, Neon and Midnight.

Information gathered from public forums or data available on the internet and portrayed here.