- Knaack
- Knab
- Knabe
- Knackstedt
- Knafel
- Knaggs
- Knak
- Knake
- Knani
- Knap
- Knape
- Knapen
- Knapik
- Knapman
- Knapp
- Knappe
- Knappert
- Knappitt
- Knapton
- Knarr
- Knas
- Knasel
- Knatchbull
- Knatt
- Knaub
- Knauer
- Knauff
- Knaup
- Knaus
- Knaust
- Knauth
- Kneafsey
- Kneal
- Kneale
- Kneath
- Knebel
- Knecht
- Knechtel
- Knedler
- Knee
- Kneel
- Kneeland
- Kneen
- Kneer
- Kneeshaw
- Kneifel
- Kneip
- Kneipp
- Kneisel
- Knell
- Kneller
- Knepler
- Knepper
- Knepshield
- Kness
- Knetsch
- Knevett
- Knewstub
- Knez
- Knezevic
- Knezevich
- Kng
- Kniaz
- Knibb
- Knibbe
- Knibbs
- Knichel
- Knickerbocker
- Knickrehm
- Knie
- Knief
- Knieling
- Kniep
- Knieriem
- Knierim
- Knies
- Knife
- Knifton
- Knigge
- Knight
- Knightbridge
- Knighten
- Knighting
- Knightley
- Knightly
- Knighton
- Knights
- Knigth
- Knijff
- Knill
- Kniola
- Knipe
- Knipmeyer
- Knipp
- Knippel
- Knipper
- Knipping
- Knips
- Knisely
- Knisley
- Knittel
- Knitter
- Kniverton
- Kniveton
- Knivett
- Knob
- Knobel
- Knoblauch
- Knoblich
- Knobloch
- Knock
- Knockaert
- Knocker
- Knode
- Knoell
- Knoepfel
- Knoepfle
- Knoetze
- Knol
- Knoles
- Knoll
- Knollman
- Knollys
- Knoops
- Knop
- Knope
- Knopek
- Knopf
- Knopfler
- Knoph
- Knopik
- Knopp
- Knops
- Knor
- Knorpp
- Knorre
- Knot
- Knote
- Knotek
- Knoth
- Knottenbelt
- Knotts
- Know
- Knower
- Knowlden
- Knowle
- Knowler
- Knowles
- Knowling
- Knowlman
- Knowlson
- Knowlton
- Knowsley
- Knox
- Knoyle
- Knuchel
- Knuckey
- Knuckles
- Knudsen
- Knudson
- Knudtson
- Knueppel
- Knuppel
- Knurek
- Knust
- Knut
- Knuth
- Knutsen
- Knutsson
- Knutt
- Knutton
- Knuuttila
- Knyvett