Neifion

== Welsh == === Proper noun === Neifion m (not mutable) (astronomy, Roman mythology) Neptune === See also === === References === R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “Neifion”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies Name Meanings: Neifion