Was there some great culling of bloodnames? In most of the old sourcebooks only around a dozen exclusive bloodnames are given despite the founding clans having 40 members each. I know a few of these original are non-exclusive, but that still seems like a big disparity. I'm also aware that some bloodnames are reaved, but to be down to 33% of the original seems pretty severe. Was there a certain period of Clan history or particular event that has been credited with this phenomenon?
Secondarily, I've noticed some use of names that are not on the active list. For instance, in Bills' Path of Glory, Tirant Higall has a bloodname that is not among the active list given in the Comstar book for the Nova Cats. Are there some blood names that have very low blood counts that are active but so low as to not really be worthy of official mention? In the same novel he talks about the 11 blood chapels in Ways of Seeing Park that correspond to the 11 named in the Comstar Sourcebook, and Higall is not among them.
I think there's a fundamental misunderstanding at the root of the OP's question. The Bloodnames listed in the old Field Manuals aren't the entirety of the Bloodnames available to them -- they're just the ones exclusive, at that time, to that Clan. Hundreds of other Bloodnames exist, they're just used by multiple Clans -- and it's safe to assume that unless otherwise stated somewhere in the fluff, any given Bloodname you can find in the master list in Historical: Operation Klondike is still in use. They might not have the full 25 active lineages, but they're still chugging along, filling out the collective officer corps of the Clans.
^^^ THIS
The Dozen-ish Names listed are NOT the only active names for each clan.
The names listed for each clan are the ones where that clan controls all 25 individual Heritages of that name.
If the name isn't listed, but is one of the original 40 for that house, it means that somewhere along the decades, the house lost control of 1 (or more) of the Heritages along the way & it is now shared by another clan.
For example:
If you count just the base 40 the Wolves started with they had exclusive control of all 25 heritages for only 9 of their bloodnames in 3052 (No Leader-Trio or Widowmakers)
It's not that there were only those names, just that the Wolves were only in control of 24 or less of the heritages.
General - Produces all 3 phenotypes of outstanding caliber.
Fetladral
Mechwarrior - Produces all 3 phenotypes, but, only MW Genes are top of the line.
Carns, Radick, Ward
Elementals - Produces all 3 phenotypes, but, only Elemental Genes are top of the line.
Shaw, Sradac, Tutuola
Pilots - Produces all 3 phenotypes, but, only ASP Genes are top of the line.
Ch'in, Mehta
By the time of the Wars of Reaving, they had also lost complete control of Sradac & Mehta.
And the Shaw & Ch'in lines were down to less than 6 active heritages each.
Unless specifically stated, I just assume all Bloodnames of a Clan are in use. Sure, there might only be a few active Bloodrights for a house.
Agreed