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Lennan

Boy name · Irish

Lennan is an Irish boy name. Irish names are loved for their lilting sound and their links to Celtic saints and legends. It sounds crisp and confident, it's simple to spell and say, and it pairs well with middle names of almost any length.

Did you know?

  • GenerationLennan is having its moment right now. Most Lennans are still in diapers or at preschool, so picture a Gen Alpha or Gen Beta kid.
  • HistoryLennan first shows up in US birth records in 2013, the first year at least 5 babies got it. That makes it a fairly new name, younger than many of today's parents.
Yawning baby in a knit hat beside a teddy bear
hello, little Lennan

US births per million boys, 2023–2025

01.5320232023

Similar names

Unisex name: LennonBoy name: RonanUnisex name: LennoxUnisex name: BrennanUnisex name: KenanUnisex name: Keenan
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Popularity: U.S. Social Security Administration (babies with 5+ births per year).

About the name Lennan

Lennan is a boy name of Irish origin. Its two syllables give it an easy rhythm, and the consonant at the end gives it a confident finish. It's a fresh, modern name that only arrived in US birth records in recent decades. It's rarely heard today, so it stands out while still being a real, established name.

Origin:Irish names

More Irish boy names

Questions about the name Lennan

What is the origin of the name Lennan?

Lennan is Irish in origin. Other Irish names to consider are Liam (“resolute protector”), Owen (“well-born”), Logan (“little hollow”) and Nolan (“descendant of Nuallán”).

Is Lennan a boy or girl name?

Lennan is a boy name, though a few girls are given it too each year.

How popular is the name Lennan?

Lennan is rare: fewer than 5 US boys got it in 2025, and it was last given to 5 or more in 2023. It peaked at #12,239 in 2023, so it's a name with history that few kids share today.

What should I know before naming my baby Lennan?

Lennan is an Irish boy name. Irish names are loved for their lilting sound and their links to Celtic saints and legends. It sounds crisp and confident, it's simple to spell and say, and it pairs well with middle names of almost any length. Say it out loud with your last name and any middle names you're considering, and check the initials it makes.