The anthroponymy of
Dylan is rooted from the
Welsh (more specifically, from the
Proto-Celtic) word for
Influential and is especially related to water. Dylan is formed from two Welsh words,
dy- meaning
'thy' or
'thine', also
you (sing.) and
llanw, reconstructed in Proto-Celtic
φlanwo- meaining
flood or
filling. This gives rise to echoes in Gaelic for
'the water edge' or
'wave, surge, billow'.
Esstentially, Dylan is the descendant of a compound of the Proto-Celtic
*dī- φlanu-s which, taken together have a contextual meaning relative to
'The flood that receeds',
'The wave that floods',
'The tide that returns' (
English Wikipedia).