Names with the letter K in them (especially as the first or last letter), for some reason, look tougher than names without it. Perhaps it's because this letter is rarely used by itself the English language, and thus it sounds sinisterly foreign. Or maybe it's because those few English words are mostly of a rather morbid variety (e.g., "kill", "keelhaul", "kick", "kidney", "kitten"), and the name sounds scary by association. Note: This trope is brought to you by the letter "K". Names with "c", "cc", "ck", "cch", "q", "cq" etc. are not this trope. "Kh" is okay, though.