Will of Joseph Janson, Merchant of Harrow on the Hill , Middlesex 21 February 1766 PROB 11/916 

Will of Sarah Janson, Wife of London 03 February 1763 PROB 11/884 

Will of John Janson of Ashby Saint Ledgers, Northamptonshire 23 February 1658 PROB 11/275 

Will of Jans Jansen or Janson, now belonging to the Ship called the Hawke bound to the East Indies George Kent 08 July 1762 PROB 11/878 

Will of Peter Johnson otherwise Pieter Janson, Mariner 16 March 1763 PROB 11/885 

Will of Francis Janson, Linnen Draper of Bread Street London 23 April 1770 PROB 11/956 

Will of Christopher Janson, Gentleman of Nappa, Yorkshire 24 December 1802 PROB 11/1384 

Will of Miriam Janson formerly Bell, Wife of Darlington , Durham 23 December 1797 PROB 11/1299 

Will of Frederic Janson, Lloyds Underwriter of Stoke Newington , Middlesex 06 May 1833 PROB 11/1816 

Will of Elizabeth Janson, Widow of York , Yorkshire 21 October 1839 PROB 11/1917