Eevee has eight distinct evolutions in the Pokémon series.
They are Vaporeon, Jolteon, Flareon, Espeon, Umbreon, Leafeon, Glaceon, and Sylveon. These evolutions are commonly called Eeveelutions by fans, although the individual Pokémon have different types and evolution methods.
The first three appeared in Generation I: Vaporeon is Water-type, Jolteon is Electric-type, and Flareon is Fire-type. Espeon and Umbreon arrived in Generation II, followed by Leafeon and Glaceon in Generation IV and Sylveon in Generation VI.
Eevee's branching evolution design makes it different from Pokémon with one fixed evolutionary path. The available evolution can depend on an evolutionary stone, friendship, time of day, location, or a move known by Eevee.