Katherine Jones, Viscountess Ranelagh (1615–1691) was a leading Anglo-Irish intellectual in London of the Interregnum period. She was sister to Robert Boyle, and in her own right a political and social figure closely connected to the Hartlib Circle.[1]
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She was born Katherine Boyle, daughter of Richard Boyle, 1st Earl of Cork and one of a very large and important Anglo-Irish family. She married Arthur Jones, 2nd Viscount Ranelagh, in 1630.[2]
In the mid-1640s in London, having left Ireland after the rebellion of 1641,[3] she came to be a friend and supporter of John Milton, sending him as pupil her nephew Richard Barry in 1645.[4] Barry was followed some time later by her son Richard.[5]
Apart from Samuel Hartlib himself and his closest ally John Dury, she knew John Beale, Arnold Boate and Gerard Boate, Sir Cheney Culpeper, Theodore Haak, William Petty, Robert Wood and Benjamin Worsley.[1] Christopher Hill suggested that her house may have been the meeting place of the "Invisible College" of the later 1640s.[6] From 1656 Henry Oldenburg was tutor to her son Richard.[7] In the 1650s her brother Robert Boyle had a laboratory in her London house, as well as in Oxford, and they experimented together. She was also prominent in the Hartlib Circle of correspondents.[8]
In 1656 she went to Ireland on family business, staying several years.[9] With Arthur Annesley and William Morice she interceded for Milton, arrested after the English Restoration of 1660.[10] In 1668 her brother Robert came to live with her on Pall Mall.[11]
Her children were: