Tanist

An alternate title for a Prince

In Tir Righ, Tanist & Ban Tanist are the HEIRS to the Principality Throne.

In Avacal, HEIRS to the Principality Throne are called the Tanist & Tanista and referred to as Their Excellencies.

In Summits, the Tanist & Tanista are the heirs to the Principality Throne.