iâr fach yr haf

== Welsh == === Etymology === Literally, “little hen of the summer”. === Noun === iâr fach yr haf m (plural ieir bach yr haf) butterfly Synonyms: pilipala, glöyn byw === Mutation === === Further reading === D. G. Lewis, N. Lewis, editors (2005–present), “iâr”, in Gweiadur: the Welsh–English Dictionary, Gwerin R. J. Thomas, G. A. Bevan, P. J. Donovan, A. Hawke, et al., editors (1950–present), “iâr fach yr haf”, in Geiriadur Prifysgol Cymru Online (in Welsh), University of Wales Centre for Advanced Welsh & Celtic Studies