Kelvan
- Appearance: Uncertain
- Nonhumanoid
- Twice the size of an adult Klingon (DS9: "Time's Orphan")
- Dozens of tentacle limbs (TOS: "By Any Other Name")
- Capable of forming biological shells containing their true forms in some manner, allowing for humanoid appearance (TOS: "By Any Other Name")
- Nonhumanoid
- Homeworld: Kelva
- Relocation to Milky Way begun in the mid-20th century (TOS: "By Any Other Name")
- First Kelvans arrived mid-February 2268 (TOS: "By Any Other Name")
- After initial clash with USS Enterprise, Kelvan refugees agreed to receiving Federation aid, support in establishing a local settlement on an otherwise-uninhabited planet to receive further refugees as they arrive (TOS: "By Any Other Name")