Robert Day (1836–1914) was an Irish antiquarian and photographer who collaborated with Franz Tieze in producing imitation Williamite, Jacobite and Irish Volunteer glassware.
He was involved in his family's extensive saddlery business together with a sports shop well known to Cork anglers.
There, he gathered an enormous collection of Irish archaeological artefacts which were auctioned in 1915 and turned up in the collections of John Hunt in Limerick and Walter J. Verschoyle-Campbell, as well as the Birmingham Archaeological Society, the Louth Archaeological Society, the Ulster Museum and the National Museum of Ireland.
An ongoing project at the Archaeology Department University College Cork is seeking to trace items from this auction.
Another grandson was the noted writer and wood engraver Robert Gibbings.