I'm only one with a name like that. The quirk has to do with the syllables in out names. The last syllable in our first name is the start of first syllable in the next sibling's name. I'm the middle child of five kids, my older brother name is Milluki and my younger sister name is Alluka.

[It's sort of creative.]

As for why mine gets the special privilege of being about killing. I'm pretty sure it was an in-joke about the family business.