Sibling Names Starting With K

47 US sibling names beginning with K, each linking to scored sibling name pairings. Sorted A–Z; switch to popularity below.

How common are K names?

In 2025, 5.12% of US baby boys and 4.88% of baby girls in the Social Security records got a first name starting with K. In 1990 the figures were 4.18% and 10.6%.

Top K names by 2025 rank
NameForRank in 2015Rank in 2025
Kaiboys#145#93
Kaydenboys#95#135
Knoxboys#258#196
Kennedygirls#58#85
Kinsleygirls#113#93
Kehlanigirls#3,279#149

The biggest climber on this page is Kehlani: #3,279 among US girls in 2015, #149 in 2025.

On the sibling pages, a brother or sister name that also starts with K scores lower, because two K names are easy to mix up when you call them together.

Sibling Names starting with K

This page lists 47 sibling names beginning with the letter K that are in real current use in the United States — including popular picks like Kennedy, Kai, Kinsley. The count comes from US Social Security Administration public records: every name shown was given to at least a handful of US babies in the latest year, so this is not a list of invented or one-off spellings.

Open any name to see its pairing page — brother and sister names that go with it, each scored for how well it fits. Use the sort control above to switch between A–Z and 2025 popularity. To browse a different letter, go back to all sibling names.