Daelyn is a modern American coinage that pairs the sound of Dale, an English word for "valley", or Day with the -lyn ending popular in names such as Jaelyn and Kaelyn. It is given to girls as well as boys and has no history before the late 20th century. For boys Daelyn ranked number 4623 in 2000 and has nudged up to number 2651 in 2025, its best rank so far, with 49 births.