Modern invented name, possibly meaning valley or bright
Deilyn is a contemporary American coinage. It likely combines the Welsh element 'dei' (beloved) or the English 'dale' (valley) with the popular 'lyn' suffix, though it is often chosen for its melodic sound rather than a specific historical lineage.
Less common today
Deilyn isn't in the latest US Top 1000. It last peaked at #10,598 in 2025.
US births per 5-year period, 1990–present (SSA data).
