First of all, thanks to lifeofpi for bringing out many unnoticed and curious tidbits which could be major clues and hints for the future episodes.
So without further a due, coming to the startling points:
Triskelion - An artful tatto on Derek's back. The website linked below states that this motif/logo means, "Blessed by Druids"
Curiously, this motif is the brand logo for this website - Order of WhiteOak.
The surname of Derek, Peter and Cora (The living members) is - Hale. It is stated that it is Old English (in which it means "Hero") or Old Saxon (in which it is "Hollow")
So here're my theories:-
So what do you guys think now! ;D