Kiera entered the American popularity list in 1988, though it lags behind the alternate spelling Keira, largely due to the fame of actress Keira Knightley.

Originally an English surname, borrowed from the place name, Kendale, Kendall was given almost exclusively to boys until the 40s when it began to be used for a small number of girls each year. By the 80s, it was a gender-neutral choice, however, since the 1993 appearance of the character Kendall Hart in the soap opera All My Children, it has been leaning feminine.

Kalani is a rhythmic name that can be used for either gender though it is predominantly used on girls in the US. With its celestial meaning, and cool K beginning, it only entered the US Top 1000 for the first time in 2015. Now in the Top 400, it joins Kai and Leilani as popular choices with Hawaiian origins.

The family of Kaylin names includes a wide variety of spellings—Kaylen, Kaelyn, and Kaylynn are a few—that enjoy varying degrees of popularity. This particular spelling plays on a couple contemporary trends, namely the ae vowel combination and the -lynn ending. While it's definitely a distinct spelling, it's likely to be misspelled more often than not.