Former Owner
- Jean-Louis Girardin de Vauvré1
- Jeannette Piccard1
- Jeremiah Styles1
- Jeronimus Maelens1
- Joachim Guerrinus de Montefegatesio1
- Joachim Windhag1
- Johann Heinrich van Ess3
- John Boykett Jarman1
- John Dozier Gordan1
- John Eliot Hodgkin1
- John Estmond1
- John Frederick Lewis91
- John Hope, 1st Marquess of Linlithgow1
- John Ives1
- John Walker1
- John West, 1st Earl De La Warr1
- John Wright2
- Julia Burgess1
- Katholieke Universiteit te Leuven Universiteitsbibliotheek1
- Klaus Dieter Dahmen1