Laetitia = Laetitia
Lambertina = Lambertine
Lambertus = Lambert
Launegisilus = Lionel
Laura = Laure
Laurens = Laurent
Laurentia = Laurence - Laurette
Laurentina = Laurence
Laurentinus = Laurent
Laurentius = Laurent
Leo = Léon
Leodegaria = Légière - Ligière
Leodegarius = Léger - Ligier
Leonardina = Léonardine
Leonardus = Léonard
Leonoria = Eléonore
Libertus = Libert
Lorenz = Laurent
Lotharia = Lorraine
Lotharius = Lothaire
Lucas = Luc
Lucia = Lucie
Ludovica = Louise - Louisette - Lisette
Ludovicus = Louis