If ya still want names from books, I've got some. (First post on ultramarines forum!)
Ok, from the book Fire Warrior (it isn't to hand, but I've remebered 2 names)
Techmarine Archellus - not sure if he's KIA or not. It says he's near to an IW's bomb that blows up, but it doesn't say whether he survives or not. MIA
Vet. Srgt Titus, 3rd comp (I think thats how the name is spelt). His combat squad is with the above techmarine. Again, MIA, for same above reasons
Theres also a Librarian that goes insane and then gets eaten- I can't remeber the name, any help?
Others :
Techmarine Servano Tomasin is annhilated by (his) melta bombs. Since I've only read this in Inferno, I don't take it as canon. Its lies, LIES I TELL YE! :D
Harkus is his apprentice. Yes, he is the one that destroys the thunderhawk for a deathwatch mission.
Techmarine Vulkan - reference in an old EoT campaign web-article on the GW. Said article has since been deleted by GW, so you might not want to put him in.
Predator "Gladus" fixture to the 1st company. Index Astartes IV /WD article on Predators.
Just out of curiosity, which book is one with the trial in it? The one where we see both Sicarius and Pythea? Its just I don't recall it being in Warriors of Ultramar or Dead Sky Black Sun. Oh and spoiler :
Another question, why does Sicarius move from 5th comp to 2nd? Surely it would make more sense for Ardias to move to the 2nd, Ideas/Ventris to move the the 3rd.....and so on? I can't find anything that says why it was done like that.
I hope that helped.
S.T