Fred Gwynne | Alfred Gwynne Vanderbilt II | Marmaduke Thweng, 1st Baron Thweng | Marmaduke Hussey | Sir Marmaduke Wyvill, 1st Baronet | Marmaduke Pickthall | Marmaduke Middleton | Marmaduke Hussey, Baron Hussey of North Bradley | John S. Marmaduke | Marmaduke Wyvill | Marmaduke Furness, 1st Viscount Furness | Marmaduke Duke | Marmaduke Cradock | Gwynne Howell | Gwynne Dyer |
Jehner and Elizabeth, his wife, went to Lille where Jehner learnt about painting and also made a useful business contact in Marmaduke Gwynne (a relative of Marmaduke Gwynne who was an early Welsh Methodist) who bought his prints and introduced him to useful contacts.