Xanathar

Xanathar may refer to one or more of several beholders:
 * Xanathar (title): the title held by the leader of the Xanathar's Thieves' Guild.
 * Xanathar (original): the original beholder named Xanathar whose identity was later claimed by another.
 * Xanathar (Kirueskai): the beholder named Kirueskai, also known as Kirukeskai, or The Eye, who claimed the identity of Xanathar in the 14 century DR.
 * Xanathar (Xandulzrithral): an elder beholder who peacefully retired from the position in order to avoid becoming a target.
 * Xanathar (Izulktur): who held the title of Xanathar for a short time in the 15 century DR.
 * Xanathar (Zushaxx): the Xanathar of the late 15 century DR.

It might also refer to:
 * Xanathar's Thieves' Guild: the thieves' guild led by Xanathar.
 * Eye of Xanathar: the Eleven Eyes of the Xanathar, or the eyes of Xanathar, a covert organization that ensured success of the Xanathar's Guild.
 * Xanathar longswords: enchanted blades used by the members of the Xanathar's Thieves' Guild circa 1372 DR.
 * Xanathar's Wrath: an adventure part of the D&D Adventurers League.
 * Xanathar's Guide to Everything: a 5 edition sourcebook.