PrattyoudaoicibaDictYouDict[Pratt 词源字典]
the surname apparently is from Old English *prætt (adj.) "cunning, astute;" related to late Old English noun prætt "a trick" (see pretty). As a type of pottery, named for Staffordshire pottery manufacturer Felix Pratt (1780-1859).[Pratt etymology, Pratt origin, 英语词源]