| Name | Group | Language of Origin | Languages of Use | Meaning/Translation or Related Words | US 2021 |
|---|
| Kary | Carey | Old Irish | English | descendant of Ciardha | |
| Kasey | Casey/Casey | Old Irish | English | descendant of Cathasaigh | |
| Kasey | Casey/Casey | Old Irish | English | descendant of Cathasaigh | |
| Kash | Cash | Old French | English | Words: case | #239 |
| Kassidy | Cassidy | Old Irish | English | descendant of Caiside | #691 |
| Kastriot | Kastriot | Albanian | Albanian | | |
| Kayce | Casey/Casey | Old Irish | English | descendant of Cathasaigh | |
| Kaycee | Casey/Casey | Old Irish | English | descendant of Cathasaigh | |
| Kayden | Caden/Kayden | Old Irish | English | son of Cadán | |
| Kayden | Caden/Kayden | Old Irish | English | son of Cadán | #108 |
| Kayla | Kayley | Old Irish | English | descendant of Caollaidhe | #255 |
| Kaylah | Kayley | Old Irish | English | descendant of Caollaidhe | |
| Kaylan | Kayley | Old Irish | English | descendant of Caollaidhe | |
| Kaylee | Kayley | Old Irish | English | descendant of Caollaidhe | #139 |
| Kayleen | Kayley | Old Irish | English | descendant of Caollaidhe | |
| Kayleigh | Kayley | Old Irish | English | descendant of Caollaidhe | #421 |
| Kaylen | Kayley | Old Irish | English | descendant of Caollaidhe | |
| Kaylene | Kayley | Old Irish | English | descendant of Caollaidhe | |
| Kayley | Kayley | Old Irish | English, Irish | descendant of Caollaidhe | |
| Kayli | Kayley | Old Irish | English | descendant of Caollaidhe | |
| Kaylie | Kayley | Old Irish | English | descendant of Caollaidhe | |
| Kaylin | Kayley | Old Irish | English | descendant of Caollaidhe | |
| Kaylyn | Kayley | Old Irish | English | descendant of Caollaidhe | |
| Kaylynn | Kayley | Old Irish | English | descendant of Caollaidhe | |
| Keagan | Keegan | Old Irish | English | descendant of Aodhagán | |
| Keaton | Keaton | Old English | English | maybe shed town | #734 |
| Keegan | Keegan | Old Irish | English, Irish | descendant of Aodhagán | #494 |
| Keeley | Kayley | Old Irish | English | descendant of Caollaidhe | |
| Keely | Kayley | Old Irish | English | descendant of Caollaidhe | |
| Kegan | Keegan | Old Irish | English, Irish | descendant of Aodhagán | |
| Keily | Kayley | Old Irish | English | descendant of Caollaidhe | |
| Keir | Kerr | Old Norse | English, Scottish | marsh land | |
| Keith | Keith | Celtic | German, English, Scottish | forest | #597 |
| Kejsi | Casey/Casey | Old Irish | Albanian | descendant of Cathasaigh | |
| Kelcie | Kelsey/Kelsey | Old English | English | Words: ship / victory | |
| Kelsea | Kelsey/Kelsey | Old English | English | Words: ship / victory | |
| Kelsey | Kelsey/Kelsey | Old English | English | Words: ship / victory | #622 |
| Kelsey | Kelsey/Kelsey | Old English | English | Words: ship / victory | |
| Kelsi | Kelsey/Kelsey | Old English | English | Words: ship / victory | |
| Kelsie | Kelsey/Kelsey | Old English | English | Words: ship / victory | |
| Kelvin | Kelvin | Scottish | English | | #907 |
| Kendal | Kendall/Kendall | Old English | English, Welsh | valley of the River Kent | |
| Kendal | Kendall/Kendall | Old English | English | valley of the River Kent | |
| Kendall | Kendall/Kendall | Old English | English | valley of the River Kent | #305 |
| Kendall | Kendall/Kendall | Old English | English, Welsh | valley of the River Kent | |
| Kendyl | Kendall/Kendall | Old English | English | valley of the River Kent | |
| Kenley | Mackinley | Scottish | English | son of Finley | |
| Kennedi | Kennedy/Kennedy | Old Irish | English | ugly head | #524 |
| Kennedy | Kennedy/Kennedy | Old Irish | English | ugly head | #70 |
| Kennedy | Kennedy/Kennedy | Old Irish | English, Scottish, Irish | ugly head | |
| Kent | Kent | Celtic | English | Words: border | |
| Kenton | Kenton | Old English | English | maybe royal manor | |
| Kenyon | Kenyon | Old English | English | | |
| Kenzie | Mackenzie/Mackenzie | Scottish | English | son of Coinneach | |
| Kenzie | Mackenzie/Mackenzie | Scottish | English | son of Coinneach | #463 |
| Kerr | Kerr | Old Norse | English, Scottish | marsh land | |
| Keyla | Kayley | Old Irish | English | descendant of Caollaidhe | #977 |
| Khari | Carey | Old Irish | English | descendant of Ciardha | #760 |
| Kimball | Kimball | Welsh | English | war chief | |
| Kingsley | Kingsley | Old English | English | Words: king / wood, clearing, meadow | #705 |
| Kinley | Mackinley | Scottish | English | son of Finley | #503 |
| Kinsey | Kinsey | Old English | English | royal victory | |
| Kirby | Kirby | Old Norse | English | maybe village with church | |
| Kirk | Kirk | Old Norse | English | church | |
| Knox | Knox | Old English | English | round hill | #221 |
| Kody | Cody | Old Irish | English | Words: son | #978 |
| Kohen | Cohen | Hebrew | English | priest | #589 |
| Kolby | Colby | Old English | English | coal town | |
| Kole | Cole | Old English | English | the black | #856 |
| Kolson | Colson | English | English | son of Cole | |
| Kolten | Colton | Old English | English | coal town | |
| Kolton | Colton | Old English | English | coal town | #511 |
| Kooper | Cooper | Old English | English | cooper, barrel maker | |
| Kordell | Cordell | Old English | English | maker of cord, seller of cord | |
| Kortney | Courtney/Courtney | Old French | English | Words: short / nose | |
| Kourtney | Courtney/Courtney | Old French | English | Words: short / nose | |
| Kourtney | Courtney/Courtney | Old French | English | Words: short / nose | |
| Krew | Carew | Welsh | English | Words: castle, fortress | #624 |
| Kyla | Kyle/Kyle/Kyla | Old Irish | English | Words: narrow, slender | #497 |
| Kylah | Kyle/Kyle/Kyla | Old Irish | English | Words: narrow, slender | |
| Kylan | Kyle/Kyle/Kyla | Old Irish | English | Words: narrow, slender | #572 |
| Kyle | Kyle/Kyle/Kyla | Old Irish | English | Words: narrow, slender | #364 |
| Kyle | Kyle/Kyle/Kyla | Old Irish | English | Words: narrow, slender | |
| Kylen | Kyle/Kyle/Kyla | Old Irish | English | Words: narrow, slender | #927 |
| Kyler | Kyler/Kyler | Dutch | English | maybe archer | |
| Kyler | Kyler/Kyler | Dutch | English | maybe archer | #242 |
| Kylie | Kyle/Kyle/Kyla | Old Irish | English | Words: narrow, slender | |
| Kyndal | Kendall/Kendall | Old English | English | valley of the River Kent | |
| Kyndall | Kendall/Kendall | Old English | English | valley of the River Kent | |
| Kynlee | Mackinley | Scottish | English | son of Finley | #921 |
| Lacey | Lacey | Old French | English | | #806 |
| Laci | Lacey | Old French | English | | |
| Lacie | Lacey | Old French | English | | |
| Lacy | Lacey | Old French | English | | |
| Lamont | Lamont | Old Norse | English | lawgiver, lawyer | |
| Landan | Landon | Old English | English | long hill | |
| Landin | Landon | Old English | English | long hill | |
| Landon | Landon | Old English | English | long hill | #73 |
| Landyn | Landon | Old English | English | long hill | #689 |
| Lane | Lane | Old English | English | lane | #261 |
