The Clan is called K9 for a number of reasons.
Firstly, the K, means Killer. Which is what we are, and what We excel at doing. We strive to get many kills in battle, to show that We're a force to be reckoned with.
Secondly, The 9 is the highest single digit number. If you count from 1-9, You'll see that 9 is the highest number. We always strive to reach the highest level, whether it be skill-wise or knowledge wise. And when We do reach that level, We will be like a towering sky-scraper, seeing all that is, and isn't, below us. But like the 9, We must not become arrogant, Because We're made up of the numbers below us, and are nothing without them. Just like a General is nothing without his troops.
K9 also sounds a bit like kanine, which is a dog. So in a sense, We may also be Dogs of War. And like dogs, We're Loyal, Strong and like the K9's of its teeth, Sharp.