Brockhaus-1911: Howard · Castle Donington · Union Castle Line · Castle · Balmoral Castle · Barnard Castle · Cape Coast Castle
DamenConvLex-1834: Katharina Howard · Howard, Katharina
Herder-1854: Howard [2] · Howard [3] · Howard [1] · Cape-Coast-Castle
Meyers-1905: Fort Howard · Howard · Howard-Association · Mona Castle · Maiden Castle · My house is my castle · Pendennis Castle · Longford Castle · Leeds Castle · Lumley Castle · Lulworth Castle · Penrhyn Castle · Saltwood Castle · Restormel Castle · Streatham Castle · Thirlwall Castle · Thirlestane Castle · Ravensworth Castle · Porchester Castle · Picton Castle · Powis Castle · Raglan Castle · Raby Castle · Hurst Castle · Castle Donington · Castle · Castle-Line · Coast Castle · Clarendon Castle · Barnard-Castle · Abergeldie Castle · Belvoir Castle · Cape Coast Castle · Broughton Castle · Farleigh Castle · Elvaston Castle · Floors Castle · Gwrych Castle · Gordon Castle · Conisbrongh Castle · Coity Castle · Corfe-Castle · Dunstanburgh Castle · Dunnottar Castle