From the barn or dwelling near the water
Laithen is a modern variant of the English surname Lathan or Layton. It likely derives from Old English elements meaning a settlement or barn, often associated with a water meadow or leek garden. Its usage as a first name is a contemporary development, following the trend of 'n' ending surnames for boys.
Less common today
Laithen isn't in the latest US Top 1000. It last peaked at #7,581 in 2010.
US births per 5-year period, 1990βpresent (SSA data).