Hi Shortcut,
There are two entries for a William KERR in Stowers' Discharged in New Zealand, the entry below and another for a William A KERR of the Wellington Rangers who was killed in action at Te Ngutu o te Manu on 21 August 1868 (page 153).
Stangely, the Maori War record I'll get for you doesn't appear to be for either of these men.
Do you have any other information about the William KERR you are seeking, such as date or place of death?
New Zealand Medal to Colonials. Detailed medal rolls of officers and men in colonial units who received the New Zealand Medal for service in the New Zealand Wars 1845-1872. (10th ed.) Stowers, 2010.
p.42
Unit: Colonial Defence Force – Auckland Squadron
Name: KERR, William
Rank: Private, No. 1 Troop (14 July 1863-29 July 1864)
Where joined unit and period of service: -
Rank & period of service with other units: -
Address at time of medal claim: Westwood Terrace, Christchurch.
Actions: Rangiaowhia 21 Feb 1864, Te Ranga 21 Aug 1864.
Date & place of Birth: -
Career (on enlistment): -
Date of death: -
Ship travelled to New Zealand: -
Year of Gazette notice:
AD36/3 or Medal Register number: 3263
Archives NZ file reference: AD32/392
Note: Issued 1913.
The Auckland Squadron of the Colonial Defence Force was also known as the Auckland Cavalry Volunteers. As a unit present at skirmishes around Paterangi and Te Rore Feb 1864, Rangiaowhia 21 Feb 1864, Hairini 22 Feb 1864, Orakau 31 Mar to 2 April 1864 (present at charge 2 Feb 1864), Maketu and Matata April 1864 (few), Te Ranga 21 June 1864. Duties included dispatch riding, scouting and patrolling.
Spades