Delicate or languid; also possibly a variation of Delia.
Deliyah is a modern American coinage, likely a creative blend or phonetic variation of Delilah or Delia. If linked to Delilah, it stems from the Hebrew 'Dalilah' meaning delicate or weak. Alternatively, it may serve as an elaborated form of Delia, which refers to the Greek island of Delos.
Less common today
Deliyah isn't in the latest US Top 1000. It last peaked at #5,680 in 2021.
US births per 5-year period, 1990βpresent (SSA data).