Great tide or son of the sea
Dylyn is a modern creative spelling of the Welsh name Dylan. In Welsh mythology, Dylan Ail Don was a sea deity, and the name's components 'dy' (great) and 'llanw' (tide) reflect this connection to the ocean.
Fewer than 5 boys were named Dylyn in 2025.
US births per 5-year period, 1990–present (SSA data).
