Well here is the 1850 list I was referring to and it includes a load of names that I intend to use for my army. Now I haven't ironed out fluff for these guys, as I said when I introduced them last week the inspiration came from a desire to make the models. However I can quite see a version of Samurai's codes of honour being appropriate to the Grey Knights so it feels like a good place to start from.
The List:
The Shogunate Brotherhood
Grand Master Toranaga
The
Willowblade (Nemesis Force Sword)
Psychic
Ammunition, Rad Grenades, Melta Bombs
The Hatamoto
Council (3 Servo Skulls)
220
5 Daimyo Paladins of the Brotherhood
A
Master-crafted Daemon Hammer
A
Psycannon
A
Halberd
A
Brotherhood Banner
An
Apothacary
Psychic
Ammunition
420
5 Samurai Terminators of the Brotherhood
A
Master-crafted Daemon Hammer
A
Psycannon
A
Brotherhood Banner
2
Pairs of Katana (Falchions)
Psychic
Ammunition
285
6 Samurai Terminators of the Brotherhood
A
Master-crafted Daemon Hammer
A
Psycannon
4
Pairs of Katana (Falchions)
Psychic
Ammunition
310
Brother Murasama, Dreadknight
Heavy
Psycannon
The
Tachi (Nemesis Greatsword)
195
Brother Buntaro, Dreadnought
Twin-linked
Autocannon
Psychic
Ammunition
Extra
Armour
Searchlight
146
Anjin, Stormraven
Hurricane
Bolters
Psychic Ammunition
Extra Armour
Searchlight
271
1847
I would love some guidance on the list here, whilst I'm happy with it overall I'm not good with the ins and outs of list building so all tips welcome.