Constantine Augustus was born in 1813 to the 13th Viscount Dillon and his wife Henrietta,[1] daughter of Colonel Dominick Browne, Governor of the County of Mayo.
[3] The couple sailed to New Zealand on the George Fyfe, arriving in Nelson on 12 December 1842.
On arrival to New Zealand Dillon gained substantial holdings in the Waihopai Valley, known as Leefield, and became a local magistrate.
In 1848 Dillon was appointed civil and military secretary to Governor George Grey resulting in a brief relocation to Auckland.
[4] On 16 April 1853, Dillon drowned in the Wairau River while returning to Nelson with his son from Leefield.