Earth Dawn / Shadowrun, Whos who Options

[Seth]

I am about to run an Earthdawn / Shadowrun crossover game, and I thought I would get my facts straight before I start.

Question1: The original princes:

The original council of princes in Tir Tairngire, I am assuming they are all immortal elves from earth dawn:

• Prince Sean Laverty
• Prince Jenna Ni'Fairra
• High prince Lugh Surehand
• Ehran the Scribe

The main elven figure I remember from playing Earthdawn was Queen Alachia. I keep thinking she is Jenna, but I cannot find a supporting reference: My search fu is too weak! Does anyone know what names the original princes had back in Earthdawn and what role they had?

Question 2: What happened to Lofwyr
In the (very tattered) source book I have of Tir Tairngire Lofwyr was voted onto the council, mostly by the political might of Lugh Surehand, despite Ehran's best efforts. I think in 2070 or so Hestaby is the draconic prince and Lofwyr has gone. What happened? and what are the best source materials to acquire to understand what happened?

Question 3: Tir Na Nog and Tir Tairngire
Its pretty clear that this is being set up to be the seelie and the unseelie court. I don't really "get" Tir Na Nog, it seems to be mostly irish rather than elvish. Does anyone know the major players in Tir Na Nog that were around in Earthdawn and their roles? I have the Tir Na Nog source book, what are other good source materials?

Thanks for the help