No O Diochon households in Griffith's.
|Deehan||fairly rare: Donegal-Derry. Ir. Ó Díochon, díochú, great hound. Also as Deighan, Dickson. SI & SGG.|
|Dehaene||Very rare: Dublin.|
|Deighan||Quite numerous N Ulster. Ir. Ó Díochon, Duibhginn. The former a sept of Oriel which is more appropriate to the present location. See also Deehan.|
|Ó Díochon||Deehan, Deighan: cuíosach annamh: Doire, Tír Conaill. Deineadh Dickson de in Aontroim. Tá Ó Duibhginn ar Deighan, leis.|
Parishes where O Diochon and a second surname are found together
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