Katherine or Catherine Philips (1 January 1632 – 22 June 1664), also known as Orinda, was an Anglo-Welsh poet, translator, and woman of letters. She achieved renown as translator of Pierre Corneille's Pompée and Horace, and for her editions of poetry.
Born in London, Katherine Philips was daughter of John Fowler, a Presbyterian merchant of Bucklersbury, London. Philips is said to have read the Bible through before she was five years old. Additionally, she acquired remarkable fluency in several languages. She broke with Presbyterian traditions in both religion and politics, and became an ardent admirer of the king and his church policy. In 1647, when she was sixteen, she married a Welsh Parliamentarian named James Philips who was thought to be 54 years old. However, the marriage certificate has since proved that he was actually 24 years old.
She attended boarding school from 1640 to 1645 where she began to write verse within a circle of friends and to appreciate French romances and Cavalier plays from which she would later choose many of the pet names she gave members of her Society of Friendship.
The Society of Friendship had its origins in the cult of Neoplatonic love imported from the continent in the 1630s by Charles I's French wife, Henrietta Maria. Members adopted pseudonyms drawn from French pastoral romances of Cavalier dramas. With wit, elegance, and clarity, Philips dramatised in her Society of Friendship the ideals, as well as the realities and tribulations, of Platonic love. Thus the Society helped establish a literary standard for her generation and Orinda herself as a model for the female writers who followed her. Her home at the Priory, Cardigan, Wales became the centre of the Society of Friendship, the members of which were known to one another by pastoral names: Philips was "Orinda", her husband "Antenor", and Sir Charles Cotterel "Poliarchus". "The Matchless Orinda", as her admirers called her, was regarded as the apostle of female friendship, and inspired great respect. She was widely considered an exemplar of the ideal woman writer: virtuous, proper, and chaste. She was frequently contrasted to the more daring Aphra Behn, to the latter's detriment. Her poems, frequently occasional, typically celebrate the refined pleasures of platonic love. Jeremy Taylor in 1659 dedicated to her his Discourse on the Nature, Offices and Measures of Friendship, and Cowley, Henry Vaughan the Silurist, the Earl of Roscommon and the Earl of Cork and Orrery all celebrated her talent.