[ANSTHRLD] Heirs to Principalities--Title Question

[HerrDetlef]

This is one that we don't mess with much here in Ansteorra, but for anyone
who travels out of kingdom...

What is the SCA custom for titles and styles for heirs to principalities?

To draw on mundane precedent: the heirs to the princpality of Liechtenstein
are titled "Hereditary Prince" and "Hereditary Princess" ("Erbprinz" and
"Erbprinzessin"), and they are styled "Serene Highness" in the same way that
the Prince and Princess are.

But if memory serves, I have heard of some principalities calling their
heirs "Tanist" and "Tanista," while some others call theirs "Lord" and
"Lady" of the principality in question. And I have no clue about style (for
that matter, I'm not sure if even the Princes and Princesses are styled
"Serene Highness").

I'm working on a chart of titles and styles that go with various ranks, and
I want to be accurate.

Yours in these Current Middle Ages,
Detlef von Marburg
Tir Medóin Pursuivant

-- 
Hwæt! We Gardena         in geardagum,
þeodcyninga,         þrym gefrunon,
hu ða æþelingas         ellen fremedon.
Oft Scyld Scefing         sceaþena þreatum,
monegum mægþum,         meodosetla ofteah,
egsode eorlas.         Syððan ærest wearð
feasceaft funden,         he þæs frofre gebad,
weox under wolcnum,         weorðmyndum þah,
oðþæt him æghwylc         þara ymbsittendra
ofer hronrade         hyran scolde,
gomban gyldan.         þæt wæs god cyning!