Dillan

Dillan is an anglicized spelling variant of the Irish and Welsh name Dylan, derived from the Welsh elements dy (meaning "great" or functioning as an intensive prefix) and llanw (meaning "tide" or "flow"), giving an overall sense of "son of the sea" or "great tide." The name appears in Welsh mythology as Dylan ail Don, a figure associated with the sea in the Mabinogion. Its popularity in the English-speaking world was boosted significantly by the fame of Welsh poet Dylan Thomas and American musician Bob Dylan. Other common spellings include Dylon, Dylen, and Dillon.