| Word/Phrase | Definition | Useage |
| kallad | called, named | Swedish |
| kallbrand | gangrene | Swedish |
| kammarskrivare | assistant clerk | Swedish |
| kapellförsamling | chapelry, dependent branch of a parish | Swedish |
| kaplan | assistant minister | Swedish |
| karbunkel | carbuncle | Swedish |
| käresta | loved one, wife | Swedish |
| karl | man, male | Swedish |
| karta | map | Swedish |
| katalog | directory, catalog | Swedish |
| katekismilängd | communion record | Swedish |
| katolsk | Catholic | Swedish |
| kavallerist | cavalryman | Swedish |
| Kedger | Fisherman | UK Occupation |
| Keeker | Colliery 'quality control' man and weighman | UK Occupation |
| Keeler / Keelman | Bargeman on Newcastle Keels - river boats carrying coal down river to ships loading off-shore. More Info. | UK Occupation |
| Kellerman | A person in charge of the wine-cellars in a great house or castle - of German origin | UK Occupation |
| Kempster | Wool / cotton comber | UK Occupation |
| Kiddier | 1) Dealer in young goats and skins 2) Skinner | UK Occupation |
| kikhosta | whooping cough | Swedish |
| Kilner | In charge of pottery kiln/s - limeburner | UK Occupation |
| King's evil | 'King's evil' is swelling of joints and lymph glands or scrofula, not necessarily from TB (the touch of a king was supposed to cure it) | Medical |
| Kirk-master | Deacon in a church | Scot.Occup |
| Kish maker | Maker of woven willow baskets | Scot.Occup |
| Kisser | Made cuishes and high armour | UK Occupation |
| klensmed | toolmaker, locksmith | Swedish |
| klockare | parish clerk | Swedish |
| Knacker | 1) Harness maker 2) dealer in old and dead animals - 'Knacker's yard' | UK Occupation |
| Knappers / Nappers | Dressed and shaped flint as required, mainly for flintlock firearms | UK Occupation |
| knekt | soldier | Swedish |
| knektekontrakt | agreement of enrollment | Swedish |
| Kneller / Knuller | Door to door chimney sweeps | UK Occupation |
| Knock Knobbler | Dog Catcher | UK Occupation |
| Knocker-up | Man who awoke factory workers with a long stick, knocking on the bedroom windows - often the Lamplighter | UK Occupation |
| Knoller | Bell toller | UK Occupation |
| kofferdi | merchant marine | Swedish |
| kolare | charcoal burner | Swedish |
| kolera | cholera | Swedish |
| kolik | colic | Swedish |
| kommen ifrån | came from | Swedish |
| komminister | assistant minister | Swedish |
| kommun | township, municipality, parish | Swedish |
| kommunikant | person receiving communion | Swedish |
| kommunionbok | communion book | Swedish |
| kommunionlängd | communion record | Swedish |
| kön | sex, gender | Swedish |
| konfirmation | confirmation | Swedish |
| konfirmationslängd | confirmation record | Swedish |
| kontrahenterna | marriage applicants | Swedish |
| kontrakt | deanery (clerical district) | Swedish |
| konung, kung | king | Swedish |
| konvulsioner | convulsions | Swedish |
| köpebrev | purchase deed, title deed | Swedish |
| köping | small town | Swedish |
| köpman | merchant | Swedish |
| kopparslagare | coppersmith | Swedish |
| koppor | smallpox | Swedish |
| körsnär | furrier | Swedish |
| kov | shortness of breath | Swedish |
| kräfta | cancer | Swedish |
| kramp | convulsions | Swedish |
| krank | illness | Swedish |
| krigsarkiv | war archive, military archive | Swedish |
| kristendomskunskap | religious knowledge | Swedish |
| kristnad | christened, baptized | Swedish |
| krono- | belonging to the crown (government) | Swedish |
| kronohemman | farm owned by the crown (government) | Swedish |
| Kruchhusten | Whooping cough | Medical |
| krukmakare | potter | Swedish |
| kung, konung | king | Swedish |
| kungarike | kingdom | Swedish |
| kunglig | royal | Swedish |
| kusin | cousin | Swedish |
| kväll | evening | Swedish |
| kvarlåtenskap | possessions left after death | Swedish |
| kvarn | mill | Swedish |
| kvarter | block, quarter | Swedish |
| kvävning | suffocation | Swedish |
| kvinna, kvinnkjön | woman, female | Swedish |
| kyrka | church | Swedish |
| kyrkobok | parish register | Swedish |
| kyrkoby | village in which the parish church is located | Swedish |
| kyrkogång | introduction of mother into congregation after childbirth | Swedish |
| kyrkogård | churchyard, cemetery | Swedish |
| kyrkoherde | parish minister | Swedish |
| kyrkosocken | ecclesiastical parish | Swedish |
| kyrkotagen | introduction of mother into congregation after childbirth | Swedish |
| kyrkovaktare | church officer | Swedish |
| kyrkovärd | church or parish warden | Swedish |