Robins, in his "History of Paddington," mentions an inquisition taken in 1481, in which "The Groves, formerly only three fields, had extended themselves out of Kensington into Brompton, Chelsea, Tybourn, and Westbourne." The manor passed later to William Essex. It was bought from him in 1570 by the Marquis of Winchester, Lord High Treasurer of England.
Lysons says: "The name of this place was anciently called Tiburn, from its situation near a small bourn or rivulet formerly called Aye-brook or Eye-brook, and now Tybourn Brook. When the site of the church was altered to another spot, near the same brook, it became St. Mary at the Bourne, now corrupted to St. Mary le bone or Marybone."
MARYLEBONE CHURCH. William de Sancta Maria, who was Bishop of London in the reign of King John, appropriated the church at Tybourn to the Priory of St. Lawrence de Blakemore in Essex, but with the reservation of a maintenance for a vicar. In 1525 the Priory suffered the fate of its fellows, and the King seized the control of Tybourn Church.