Dailyn is a modern American coinage that pairs the Day- sound of Daylin and Dakota with the -lyn ending of Kaylin and Jaylin; it has no established meaning, though parents often connect it to the word "day". It belongs to the large family of -lyn names invented in the United States since the 1990s. Dailyn surged from number 3,668 in 2015 to a peak of number 1,140 in 2020 and has since settled back to number 2,700 in 2025, with 64 births.