Lean is an Irish name derived from the Irish surname Ó Laighin, which is believed to have originated from the Irish word 'laighin' meaning 'from Laighin'. This name was traditionally given to someone who originated from the ancient Kingdom of Leinster in Ireland. The name Lean has a unique and distinct sound, making it an attractive choice for parents seeking a rare yet meaningful name for their child.
The name Lean experienced significant fluctuations in popularity over the years, with peaks in the late 1960s and early 1980s, and a notable spike in recent times with 17 births recorded in 2010. However, it remains relatively uncommon overall, with a total of 671 births recorded between 1916 and 2023.