J and K are two of my favorite letters in the alphabet. The letter J is relatively used infrequently in the English alphabet while the letter K is also a rare letter that is used.

J: Jaden, Janet, Jennifer, Jessica, Jasmine, Justine...

K: Kyle, Kirk, Kevin, Kurt, Kenny, Kody...

Most of the time when I go shopping, I always happen to see things that are monogrammed (meaning letters representing the alphabet), especially when J & K are always right next to each other.