Jan'alai is the dragonhawk god of the Amani trolls.
In World of Warcraft
This section concerns content exclusive to The Burning Crusade.
Hex Lord Malacrass stole his essence, imbuing it into one of the Amani's deadliest rogues. Jan'alai appears in Zul'Aman where his spirit is chained by Zul'jin. His is freed when the chieftain troll is killed.
This section concerns content exclusive to Wrath of the Lich King.
This section concerns content exclusive to Cataclysm.
Jan'alai appears in Zul'Aman where his spirit is chained by Daakara. His is freed when Daakara is killed.
As the Dungeon Journal says that this was initially the name of the troll, either the spirit took the name of its host in Zul'Drak, or the host was named after the loa to start with. The spirits near the final boss of Zul'Aman are nameless, possibly hinting that they did not initially have names.