1714, from Delft, town in Holland where the glazed earthenware was made, + ware (n.).
Entries linking to delftware
Delft
town in Holland,named from its chief canal, from Dutch delf, literally "ditch, canal;" which is related to Old English dælf and modern delve. As a short form of delftware, attested from 1714.
ware n.
"manufactured goods, goods for sale," Old English waru "article of merchandise," also "protection, guard," hence probably originally "object of care, that which is kept in custody," from Proto-Germanic *waro (source also of Swedish vara, Danish vare, Old Frisian were, Middle Dutch were, Dutch waar, Middle High German, German ware "goods"), from PIE root *wer- (3) "perceive, watch out for."
Usually wares, except in compounds such as hardware, earthenware, etc. Lady ware was a jocular 17c. euphemism for "a woman's private parts" (but sometimes also "male sex organs"), and Middle English had ape-ware "deceptive or false ware; tricks" (mid-13c.).