Tanistry was a Gaelic system for passing on titles and lands. In this system the Tanist (; ; ) was the office of heir-apparent, or second-in-command, among the (royal) Gaelic patrilineal dynasties of Ireland, Scotland and Man, to succeed to the chieftainship or to the kingship.

Irish nobility
The Bishop's Heir
Tanistry
Tanistry
Tanistry
`Since Time Immemorial': A Story of Common Law Jurisdiction, Native Title and the Case of Tanistry
Tanistry, the "Due of Birth"and Macbeth's Sin
The Law of the Throne: Tanistry and the Introduction of the Law of Primogeniture: A Note on the Succession of the Kings of Scotland ...
Fletcher Tanistry
Customs in conflict [microform]: sir John Davies, the common law, and the abrogation of Irish gavelkind and tanistry