There are 127 unique surnames beginning with K:

Kaeuper	Kagay	Kagy	Kahler	Kahline	Kale	Kaline
Kalteis	Kalties	Kamarar	Kandel	Kane	Kansler	Karmer
Karpik	Kasper	Kater	Kauffman	Kauffman, Oppenheimer & Company	Kaufman	Kavanagh
Kearns	Keckley	Keeler	Keeran	Keever	Keiser	Keister
Kelleher	Keller	Kelley	Kelly	Kelsey	Kelso	Kemp
Kendal	Kendall	Kennedy	Kennington	Kent	Kenton	Kerns
Kerr	Kersey	Ketch	Kettler	Keyes	Keys	Kezerta
Kezertee	Kibbey	Kierce	Kightlinger	Kilbonane	Kilbourne	Kilbury
Kile	Kilfian	Kilgore	Killbury	Killinger	Kimball	Kimbaugh
Kime	Kimerle	Kincaid	Kindall	King	Kingery	Kinikin
Kinkade	Kinkead	Kinnear	Kinney	Kinsey	Kintner	Kirby
Kirk	Kirkham	Kirkland	Kirkpatrick	Kirts	Kist	Kleiber
Kline	Klyne	Knapp	Knepper	Knight	Kniseley	Knisley
Knock	Knotts	Knox	Koch	Kock	Koehnle	Koerner
Koffroth	Kohl	Kollefrath	Koogler	Kooken	Koon	Koons
Kramer	Kreakbaum	Kreamer	Kreider	Kreidler	Kreitler	Kress
Kriby	Krieger	Kritline	Krousa	Krouse	Krouskop	Kuba
Kuhin	Kuhlman	Kuhn	Kuntz	Kunze	Kurtz	Kye
Kyle