This is a list of surnames in which the usage is Irish; and the first letter is L.
Lane 3 IrishFrom Irish
Ó Luain meaning
"descendant of Luan", a given name meaning "warrior".
Lennon IrishAnglicized form of the Irish name
Ó Leannáin, which means
"descendant of Leannán". The byname
Leannán means "lover". The name was borne by the musician John Lennon (1940-1980).
Lynch IrishFrom Irish
Ó Loingsigh meaning
"descendant of Loingseach", a given name meaning "mariner".