The first was VEXEN who was killed by Axel in Castle Oblivion.
LARXENE was second, and was killed by Sora.
Riku killed LAXAEUS in the Castle Oblivion Basement, making him third.
Fourth was MARLUXIA in Castle Oblivion by Sora.
ZEXION was fifth to be killed and was absorbed by Repliku in the Castle Oblivion Basement
Not actually being a nobody XION willingly let Roxas absorb her, making her sixth.
In Hollow Bastion/ Radient Garden, DEMYX met his fate by the hand of Sora being seventh.
XALDIN was killed by Sora and the Beast in Beast's Castle, making him eighth.
Saving Sora, AXEL performed a Suicide Attack and became ninth to die in a portal to The World that Never Was.
The Castle that Never Was became the final resting place for XIGBAR by Sora, being the tenth to fade.
LUXORD lost the game being the eleventh to lose in The Castle that Never Was by Sora
The moon couldn't help the dramatic SAIX who was twelfth to disappear by Sora
As the main villain, XEMNAS was last to lose to the light, being the thirteenth.
ROXAS joined with Sora, so he never died, yet no-one knows the fate of the nobody.
Yep. All of 'em.
In the first game Ansem dies and in the second one all the organization XIII guys die
There has not yet been a Henry XIII.
Shimun XIII Dinkha died in 1700.
Hugh XIII of Lusignan died in 1303.
They don't die, they just fade. Anyway, no, not all of them die. Roxas merges back with Sora at the end of Kingdom Hearts 2. The others all fade one way or another.
The first to die was Sasori. Defeated by Sakura and Chiyo. Other members of the organization soon follows but Kabuto had brought them back to life in the current chapter.
Charles XIII of Sweden died on 1818-02-05.
Guy XIII de Laval died in 1414.
Antipope Benedict XIII died on 1423-05-23.
Pope John XIII died on 972-09-06.
Leo XIII died on July 20, 1903, in Rome, Lazio, Italy.