Firstly on 9 April 1890, he married Helen Carnegie, daughter of the 9th Earl of Northesk.
Willis-Bund married secondly (in 1896) Mary Elizabeth Thackeray, the daughter of General Frederick Rennell Thackeray and Lady Elizabeth Margaret Carnegie (the daughter of the 7th Earl of Northesk).
Lord Northesk is an agnatic descendant of the 2nd Earl of Northesk.
It was created in 1801 for the noted naval commander John Jervis, Earl of St Vincent, with remainder to his nephews William Henry Ricketts and Edward Jervis Ricketts successively, and after them to his niece Mary, wife of William Carnegie, 7th Earl of Northesk.
James Earl Jones | Prince Edward, Earl of Wessex | Louis Mountbatten, 1st Earl Mountbatten of Burma | Herbert Kitchener, 1st Earl Kitchener | Earl | Frederick Roberts, 1st Earl Roberts | Earl of Derby | Earl Warren | Earl of Pembroke | Robert Harley, 1st Earl of Oxford and Earl Mortimer | Earl of Warwick | Thomas Wentworth, 1st Earl of Strafford | Edward Smith-Stanley, 14th Earl of Derby | Earl of Shrewsbury | William Pitt, 1st Earl of Chatham | Simon de Montfort, 6th Earl of Leicester | Richard Neville, 16th Earl of Warwick | Earl of Leicester | John Scott, 1st Earl of Eldon | Robert Devereux, 2nd Earl of Essex | Robert, 1st Earl of Gloucester | Edward Harley, 2nd Earl of Oxford and Earl Mortimer | Earl of Devon | Douglas Haig, 1st Earl Haig | My Name Is Earl | Edward Hyde, 1st Earl of Clarendon | Earl Scruggs | Earl of March | Richard Howe, 1st Earl Howe | John Russell, 1st Earl Russell |
The bronze medalist, David Carnegie, was also Earl of Northesk.