Valley or small valley
Daelan is a modern variation of the English surname Dale, which described someone living in a valley. It may also be a creative blend of names like Dale and Dylan or a variant of the Irish name Daylan. Its usage is primarily contemporary, appealing to parents seeking a familiar yet rare sound.
Less common today
Daelan isn't in the latest US Top 1000. It last peaked at #3,866 in 2018.
US births per 5-year period, 1990βpresent (SSA data).