Katherine (sometimes known as Katharine) Harriot Duncombe Pleydell-Bouverie (7 June 1895 in Berkshire – 1985 in Wiltshire) was a pioneer in modern English Studio pottery.
Pleydell-Bouverie was born in Faringdon, then in Berkshire, to Duncombe Pleydell-Bouverie and his wife Maria Eleanor, the daughter of Sir Edward Hulse, 5th Baronet, her paternal grandfather was Jacob Pleydell-Bouverie, 4th Earl of Radnor. Pleydell-Bouverie was the youngest of three children growing up in a seventeenth century stately home surrounded by blue-and-white and famille verte Chinese porcelain. It was her childhood holidays playing on a muddy beach at Weston-super-Mare with her siblings where she was first introduced to clay.