Valley or meadow
Dailen is a modern American invention, likely created as a variant of the English surname Dale or the name Daylan. It combines the nature-inspired root 'dale' with the popular '-en' suffix, suggesting a peaceful, open landscape.
Less common today
Dailen isn't in the latest US Top 1000. It last peaked at #4,101 in 2007.
US births per 5-year period, 1990βpresent (SSA data).