Small cloak or sweetheart
Derived from the Irish Gaelic name LeannΓ‘n, it traditionally translates to 'sweetheart' or 'lover'. In some contexts, it is also associated with the word for a small cloak or mantle. While historically masculine in Ireland, it is increasingly used as a gender-neutral or feminine choice in the United States.
Less common today
Lennan isn't in the latest US Top 1000. It last peaked at #5,441 in 2016.
US births per 5-year period, 1990βpresent (SSA data).