I'm not a fan of starting all your kids' names with the same letter, but if you start doing it, don't change your mind all of the sudden.
Case in point, this family in my database today (not actual names):
Kenneth & Karen Smith, parents
Kimberly, Kristopfer, Kurt, Kourtney, Jane, & Khloe, kids
Am I the only one thinking Jane is the milkman's daughter? (Jane is not adopted.)