What is Kindred?
1.
'Kindred' means 'akin to', in the sense of being related or similar to something. A 'kindred spirit' defines someone with similar values and desires to one's own.
In popular usage, the word is associated with the White Wolf roleplaying game "Vampire: The Masquerade" (later "Vampire: Requiem"). In this context, the word (usually capitalised) is used to refer to a single vampire, a group of vampires, or vampire society as a whole.
(It should be noted that this usage is a little awkward when used to refer to a single individual. Since the word 'kindred' defines similarity it therefore implies plurality.)
In general usage: "We've got so much in common. She's my kindred spirit."
In Vampire:
"He's one of the Kindred."
"This group could threaten all the Kindred in this city".
2.
A television show about Vampires
Based on the RPG Vampire:The Masquerade
Kindred:The Embraced
3.
A Brother or Sister in the Family of Vampires
You Are Kindred, are you not?
4.
A entity that has become one of the Undead
i.e. a Vampire