Nomad

Nomads are vampires who wander the world on their own or with a single partner. All or most nomads drink human blood, and most vampires are nomadic rather than affiliated with a coven. Certain covens are nomadic, meaning they wander the world without a specific area location of their own.

Twilight
There are few nomadic vampires in Twilight, as the novel serves mostly as an introduction to vampires and their culture. However, what action there is involving nomads is crucial to Twilight, New Moon and Eclipse. James' coven, consisting of himself, Victoria, and Laurent, shows up while the Cullens are playing baseball, and James immediately begins hunting Bella — partially because of the way that Edward defends her, and partially because her blood smells very tempting to any vampire, despite the particular potency that it holds for Edward. James tracks Bella to Phoenix, Arizona, but is killed by Emmett and Jasper before he can kill Bella.

New Moon
Victoria shows up again in New Moon after Edward leaves, planning to kill Bella in retaliation of James' death at the Cullens' hands. Laurent also comes back and is subsequently killed by the werewolves, although he is not a nomad by that point as he has joined Tanya's coven in Denali, Alaska.

Eclipse
In Eclipse, Victoria comes back with an army of Nomadic vampires, as Victoria's coven of newborns is Seattle-based.

These vampires are eventually destroyed by the combined forces of the Olympic Coven and Quileute tribe.

Breaking Dawn
Breaking Dawn has the most interaction with nomads, as many vampires come from all over the world to testify for the Cullens that Renesmee is not an immortal child but a half-human. The nomads who come to Forks (and others) are listed below.

Known nomads

 * Alistair
 * Boris
 * Charles
 * Charlotte
 * Cold Man (killed by the Quileute shapeshifters)
 * Cold Woman (killed by Taha Aki and his sons)
 * Fred (escaped the newborn army)
 * George
 * Huilen (created by her hybrid nephew Nahuel)
 * Jennifer (Joham's hybrid daughter)
 * Joham (father to Jennifer, Maysun, Nahuel and Serena)
 * Luca
 * Makenna
 * Mary
 * Maysun (Joham's hybrid daughter)
 * Nahuel (Joham's hybrid son)
 * Peter
 * Randall
 * Serena (Joham's hybrid daughter)
 * Shelly (escaped the newborn army)
 * Steve (escaped the newborn army)

Former nomads

 * Aro (Volturi)
 * Athenodora (Volturi)
 * Caius (Volturi)
 * Carmen (Denali coven)
 * Eleazar (Denali coven)
 * Alice Cullen (Olympic coven)
 * Carlisle Cullen (Olympic coven)
 * Edward Cullen (Olympic coven)
 * Garrett (Denali coven)
 * James (James's coven)
 * Jasper Hale (Mexican Coven, then joining Olympic coven)
 * Kachiri (Amazon coven)
 * Laurent (James's coven, then Denali coven)
 * Liam (Irish coven)
 * Lucy (Mexican coven)
 * Marcus (Volturi)
 * Maria (Mexican coven)
 * Nettie (Mexican coven)
 * Siobhan (Irish coven)
 * Victoria (James's coven)