Fr. Ignatius Spencer was born George Spencer in 1799 and was an Anglican clergyman in the area of Althorp, Northamptonshire, where Lady Diana was buried after she was killed in a Paris car crash in August 1997.
Fr. Spencer converted to Roman Catholicism at the age of 31, scandalizing some in the Victorian society.
The Spencer family, mostly members of the Church of England, were the fifth wealthiest family in the country at the time.
Early on in his priesthood, Fr. Spencer was attracted to the active contemplative community of the Passionists. He became known for his ecumenical efforts in pursuit of “unity in truth,” the same quest for truth that led him to the Catholic faith.
Source: Catholic News Agency - Priest related to Princess Diana on the path to sainthood, 31 Aug 2016, http://www.catholicnewsagency.com/news/priest-related-to-princess-diana-on-the-path-to-sainthood-66326/