I don't think that the Kador family employs the first sign, which is a circle with a triangle at its base: it is, after all, two semi circles within a semi circle with a triangle. The semi circles refer to the break between god and man. As the semicircles don't intersect, there is no imperfect reunion and even less any full reunion. I'd think the multiple circles would indicate a plural 'men', and thus a less abstract level than the "man (in general)". After the fall It's more like "Men fallen, but upheld/elevated/exalted by God."
I didn't say they employed it exactly, I said they used one clearly inspired by it. It looks halfway between the first sign and the standard semi-circle sign. It's three-quarters, which indicates to me a near-reunion with God. Still not complete, but also not quite as broken as before.
"Men fallen, but upheld/elevated/exalted by God," might be a more accurate meaning, yes.
I believe both are correct in assuming multiple circles are plural and would like to add the relation to the Blood Raider Covenant symbol.
Three things:
First,
The Apocryphon quote:
"My word lies within all,
All it requires is the breath of faith,
To ignite the fire,
So the lost can find their way,
So the fallen can rise,
To take their place as my chosen,
For you are all my creation,
And are all equal in my kingdom."
Second, to take the above quote into context. The Kador symbol with multiple circles, "Men fallen, but upheld/elevated/exalted by God". I believe the Blood Raider Covenant would use the same concept, only with two equal sized semi circles representing man and god being "Man fallen, but upheld/elevated/exalted by God" and "And are all equal in my kingdom" god included.
And third,
Holy Statue:
Holy statue made by the Takmahl people, depicting their god.
Indicates the Sani Sabik and by relation the Blood Raider Covenant have seen god and have a depiction of it. I believe what they may have seen as god is a crystal skull or at least that is the depiction they have carried along.
And just like that, the depiction of god overlaid on the two semi circles becomes the Blood Raider Covenant symbol:
Note: The "horns/semi circles" are not a part of the skull, but appear to be behind it.
(Also note
https://image.eveonline.com/ for corporation images supported resolutions
)
Edit: It was mentioned to me that the intersecting circles may symbolize something as well. I believe, if anything, they symbolize the covenant between man and god, in this case literally through Blood.