From the forest; wood
Keithen is a modern elaboration of the Scottish surname Keith. It likely combines the root Keith, meaning 'wood' or 'forest', with the popular '-en' suffix found in names like Aiden or Nathan. It is often chosen by parents seeking a familiar sound with a unique twist.
Less common today
Keithen isn't in the latest US Top 1000. It last peaked at #3,666 in 1992.
US births per 5-year period, 1990βpresent (SSA data).