On Wikipedia and a bunch of other sites, we are given the names of a number of Angels, such as Sachiel and Ramiel. Yet at least in the subbed version of the original 26 episodes that I've been watching - I just got to episode 12 - I haven't seen much (if any) mention of the Angels' names. (Comparatively, I remember seeing the names of new monsters being listed as they appear in-episode in shows such as Ultraman Max. It's of course possible that I might have missed something similar in EVA, but I feel like it's hard to get through this many episodes without noticing at some point.)
Where are the names from? From sites such as this one, it seems that there is definitely official information out there, but at least in this case, this is only information for a "platinum DVD release", which would probably be quite a bit later from the original broadcast.
Thus: When and where did viewers first learn of the Angels' names? Was this within the original broadcast, or was this perhaps in something like an artbook?