Sobhuza II,, was Ngwenyama (King) of Swaziland for 82 years and 254 days, the longest verifiable reign of any monarch in recorded history.

iNgwenyama is the title of the male monarch of Eswatini. In English, the title is sometimes translated as King of Eswatini. The iNgwenyama reigns together with the Ndlovukazi, a spiritual leadership position held by the iNgwenyama's mother or another female royal of high status.