| SURNAME | CODE |
| KABLE | KEA |
| KADIERA | PRC |
| KADIRA | KEA |
| KAISER | DIV, KEA |
| KALUS | RAV |
| KANATCHER | KEA |
| KAPPEL | MIL |
| KAPPENMAN | RDA |
| KAPPLER | SHE |
| KAPS | BHC, MIL, ELM-C |
| KAREL | RAV |
| KARN | KEA |
| KARNER | KEA |
| KARSTEN | PLE |
| KARYSAS | KEA |
| KASPER | RAV |
| KAST | SOD |
| KAUFMAN | ELM |
| KEAN | SHE |
| KEARNEY | ELM-C |
| KEASCHALL | SJC |
| KECK | KEA |
| KEEFE | KEA |
| KEENAN | KEA |
| KEENS | KEA |
| KEEP | ELM |
| KEGLEY | PRC |
| KEIFFER | KEA |
| KEIM | KEA |
| KEISER | KEA |
| KEISS | DOW, GIB |
| KELLER | DOW, KEA |
| KELLET | KEA |
| KELLEY | GIB, KEA |
| KELLY | GIB, KEA, RAV |
| KELSEY | GIB |
| KELSO | MIL |
| KEMMERIE | ELM |
| KENDIG | KEA |
| KENEVAL | KEA |
| KENEVEL | KEA |
| KENNEDY | KEA, ELM-C |
| KENNEY | OSA |
| KENOYER | PRC |
| KENYON | PVA |
| KEPHART | GIB |
| KERSHAW | KEA |
| KESSLER | GIB |
| KETCHEM | KEA |
| KETCHUM | KEA |
| KEUP | GIB |
| KEYES | KEA |
| KEYS | KEA |
| KEYSER | KEA, MIL |
| KILGORE | KEA |
| KILLGORE | KEA |
| KILLIP | KEA, PLE |
| KIM | GIB |
| KIMBELL | GIB |
| KIMBROUGH | SHE |
| KIMESTLEY | KEA |
| KIMMEL | KEA |
| KINCAID | KEA |
| KINDIG | KEA |
| KING | KEA, MIL, OSA, PLE, RAV |
| KINGSLEY | KEA |
| KINGSTOM | KEA |
| KINKADE | GIB |
| KINNE | KEA |
| KINNENBORG | RAV |
| KINNEY | KEA, PLE |
| KINSLOW | KEA |
| KIRK | GIB |
| KIRKENDALL | KEA |
| KIRKPATRICK | GIB, PLE |
| KIRSCHNER | PVA, PLE |
| KISER | KEA |
| KITHCART | SHE |
| KITZMILLER | KEA |
| KLEIN | DOW, MAJ, PVA, PLE, RAV |
| KLETZING | KEA |
| KLINE | GIB |
| KLINGELHOEFER | OSA |
| KlinkACEK | SWC |
| KLOTTLE | KEA |
| KLUCKHUHN | DIV |
| KLUNDER | OSA |
| KLUSMEIER | KEA |
| KNAGGS | KEA |
| KNAPP | KEA |
| KNEHER | SHE |
| KNEISS | RAV |
| KNEPPER | GIB |
| KNERL | RAV |
| KNIGHT | RAV |
| KNOBEL | KEA |
| KNOLL | KEA |
| KNOTT | KEA |
| KNOWLES | SHE |
| KNOX | KEA, RDA, OSA |
|
| SURNAME | CODE |
| KNUTZEN | KEA |
| KOCHERSCHEIDT | RAV |
| KOEHLER | KEA |
| KOENIG | PRC |
| KOEPPE | KEA |
| KOEPPEN | OSA |
| KOESTER | ELM |
| KOFHOFFER | KEA |
| KOHLSCHEEN | PLE |
| KOHNK | SHE |
| KORCEK | KEA |
| KOSTER | OZL |
| KOZEL | RAV |
| KRAMER | RAV |
| KRASSMAN | KEA |
| KRAUSE | PLE, RAV |
| KRECK | IMM |
| KREITZER | PLE |
| KRETZSCHMAR | IMM, RAV |
| KREUTZER | IMM, OSA, PLE |
| KREUZWIESER | SWC |
| KREWSON | GIB |
| KRIHA | SWC |
| KRING | ELM, KEA |
| KRISHER | GIB |
| KRISSEL | RAV |
| KROHN | KEA |
| KRONEGG | KEA |
| KROTZ | PLE |
| KROEGER | PLE |
| KRUEGER | PLE, IMM |
| KRUGER | KEA |
| KRUMBACK | KEA, PRC |
| KRUMMACK | KEA, RAV |
| KUBIK | SWC |
| KUCERA | SWC |
| KUEBLER | IMM |
| KUEHNEL | BHC, PVA |
| KUNKLE | SHE |
| KUSCHALL | SJC |
| KUSTER | ZEL |
| KUTICKA | RAV |
| KUTZ | DOW |
| KYNE | RAV |
| KYSER | KEA |
| LABAR | MIL |
| LA BARRE | GIB |
| LABS | IMM |
| LACEY | KEA, SHE |
| LACY | SHE |
| LAFLIN | KEA |
| LA fontAINE | KEA |
| LAGEY | KEA |
| LAKE | GIB, KEA, PRC, RAV |
| LAMB | KEA, RAV |
| LAMBERSON | SHE |
| LAMBERT | KEA, SWC |
| LAMMERS | DIV, PEA, PVA, PLE |
| LAMPHERE | KEA |
| LAMSON | ELM |
| LANCASTER | KEA |
| LAND | KEA |
| LANDER | KEA |
| LANDERS | KEA |
| LANDIS | KEA |
| LANDMICHAEL | RAV |
| LANE | KEA |
| LANG | KEA |
| LANGE | KEA |
| LANGER | BHC, SMC |
| LANGLEY | GIB |
| LANGSETH | SWE |
| LANTZ | ELM, KEA |
| LA PLANT | KEA |
| LARIMER | KEA |
| LARKINS | RAV |
| LARRIMER | KEA |
| LARSON | KEA, RAV, RDA, SWE |
| LASEE | GIB |
| LASHLEY | MIL |
| LATZKE | PVA, PLE |
| LAUE | KEA, RAV |
| LAUER | KEA |
| LAUGH | GIB |
| LAUGHLIN | KEA |
| LAUGHTON | RDA |
| LAURENCE | KEA |
| LAVENA | PRC |
| LAWBACK | KEA |
| LAYTON | KEA |
| LEA | PLE |
| LEACH | GIB |
| LEAKE | KEA |
| LEAR | PLE |
| LEARY | KEA |
| LEATHERS | OSA |
| LE BAR | MIL, OSA |
| LEE | KEA, SHE |
|
| SURNAME | CODE |
| LEFFELBEIN | OSA |
| LEFFLER | KEA |
| LEHMAN | KEA |
| LEIBEE | FAT, PRC |
| LEISINGER | SHE |
| LEISY | GIB |
| LEITCH | KEA |
| LEIVIN | KEA |
| LELAND | KEA |
| LEMON | KEA |
| LEMPKE | OSA |
| LENZ | DOW |
| LEONARD | ELM, GIB, KEA |
| LEONHARDT | GIB |
| LERCH | KEA |
| LESKE | KEA |
| LESKEY | KE, IMM |
| LESLIA | PLE |
| LESLIE | PLE |
| LETTERMAN | SHE |
| LETZEN | KEA |
| LEWALEN | KEA |
| LEWIS | GIB, KEA, MIL, PLE, RAV, SHE |
| LEYTON | ELM-C |
| LIBERG | KEA |
| LICKING | GIB |
| LIEBLING | DOW |
| LIEJESTROM | GIB |
| LIGHT | SHE |
| LIGHTFOOT | KEA |
| LILJESTROM | GIB |
| LINDGREN | KEA |
| LINDHOLM | MIL |
| LINDNER | BHC, PEA, PVA, PLE |
| LINDSEY | KEA |
| LINE | KEA, MIL |
| LINEBACK | GIB, SOD |
| LINGSTROM | KEA |
| link | SOD |
| LINTZ | PLE |
| LIONBERGER | PRC |
| LIPPINCOTT | SHE |
| LISY | RAV |
| LITTERMAN | SHE |
| LITTLE | KEA |
| LIVINGSTON | KEA |
| LIZER | KEA |
| LLOYD | ELM |
| LOAR | KEA |
| LOBELL | KEA |
| LOCK | OSA |
| LOCKHORN | SMC |
| LOCKWOOD | GIB, SHE |
| LODGE | MIL |
| LOEFFELHOLZ | SMC |
| LOEWENSTEIN | KEA |
| LOFFER | SHE |
| LOFT | KEA |
| LOGAN | KEA, PRC |
| LONG | DOW, KEA, OSA |
| LONGHEIN | RAV |
| LOOKER | KEA, RDA |
| LORIMOR | KEA |
| LORINGEL | KEA |
| LORRINGS | KEA |
| LOSEE | FWC, GIB |
| LOUGH | GIB |
| LOUNSBURY | KEA |
| LOVE | KEA |
| LOVELL | KEA, RAV |
| LOVERIN | KEA |
| LOVITT | KEA |
| LOWE | GIB, KEA |
| LOWELL | GIB |
| LOWENSTEIN | KEA |
| LOWRY | KEA |
| LUCA | GIB |
| LUCAS | KEA |
| LUCE | MAJ, PRC, RAV, SJO |
| LUDWIG | OSA |
| LUND | KEA, PLE, SWE |
| LUNDGREN | KEA |
| LUNDIN | OSA |
| LUNGER | GIB, KEA |
| LUNDQUIST | KEA |
| LUTES | SHE |
| LUTH | MAJ, RAV, SOD |
| LUX | SHE |
| LYBARGER | PRC |
| LYLE | GIB |
| LYMAN | KEA |
| LYNDES | MIL |
| LYNN | RAV |
| LYON | KEA |
| LYTZEN | KEA |
|
