Likely a modern variation of Delilah, meaning delicate or languid.
Delayah is a contemporary American coinage, most likely functioning as a creative phonetic spelling of the biblical name Delilah. While its specific etymology is modern, it inherits the Hebrew roots of its predecessor, which is associated with being 'delicate' or 'weakened' in a romantic or graceful sense.
Less common today
Delayah isn't in the latest US Top 1000. It last peaked at #8,550 in 2019.
US births per 5-year period, 1990βpresent (SSA data).