K names

Cassiopeia, the name of a mythological mother who became a stellar constellation, is challenging but intriguing, and has all those softening Cass nicknames available. And with all names Cass-related trending, Cassiopeia may be an unusual route to a stylish name.

Cosima, the kind of elegant and unusual name the British upper classes love to use for their daughters, is given to a handful of baby girls in the US after being chosen by two high-profile celebs in the same month; cool couple Sofia Coppola and Thomas Mars as well as supermodel Claudia Schiffer. It was used earlier by celebrity chef Nigella Lawson, while the male form, Cosimo, was given to the son of Marissa Ribisi and Beck.

Kadeem is a name made familiar by TV actor Kadeem Hardison, a fresher alternative to the better known Kareem.

This name's similarity to Kalani and pretty Hawaiian origin helped catapult it into the Top 1000 for the first time in 2013.

Original form of the more familiar Calliope, the muse of epic poetry.

Kiefer is a strong occupational surname associated with "24" star Kiefer Sutherland, but one that could well join the other 'er' surnames currently in favor. Keifer is a German surname transferred to first name use, derived from two old Germanic words, kien and forhe, both of which mean "pine tree."