- Lamar
- Lamb
- Lambert
- Land
- Lane
- Langley
- Lanier
- Lanphier
- Lapradd
- Larson
- Laughter
- Lavender
- Lawhorne
- Lawing
- Lawrence
- Lawson
- Layfield
- Layson
- Leary
- Lebow
- Leclair
- Lee
- Leger
- Leichliter
- Lemke
- Lengel
- Leonard
- Leslie
- Lester
- Leventhal
- Leverett
- Levya
- Lewis
- Liles
- Lindsey
- Linkous
- Linn
- Little
- Lively
- Lloyd
- Lockary
- Lockett
- Locks
- Logan
- Logue
- Long
- Longo
- Lord
- Lorenz
- Lott
- Loveless
- Lovett
- Lovsey
- Lowder
- Lowe
- Lowery
- Luby
- Lucas
- Lundy
- Lynch