Just in case this is the family you seek, the burials were all in Purewa.
Surname  ROBINSON 
First Names  Eliza 
Age  68 Years 
Gender  Female 
Date of Death  30 Jun 1903 
Religion  Not Listed 
Serial No  2705 
Date of Service and/or Interment  02 Jul 1903 
Funeral Director  Jas Jamieson, 27 Belgium Street, City 
What Buried?  Body 
Casket Size   
Casket Depth   
Cemetery  Purewa Cemetery 
Location  Block E Row 45 Plot 34 
Surname  ROBINSON 
First Names  John 
Age  78 Years 
Gender  Male 
Date of Death  06 Dec 1910 
Religion  Not Listed 
Serial No  4469 
Date of Service and/or Interment  08 Dec 1910 
Funeral Director  Jas Jamieson, 27 Belgium Street, City 
What Buried?  Body 
Casket Size   
Casket Depth   
Cemetery  Purewa Cemetery 
Location  Block E Row 45 Plot 033 
Probate filed 3 Feb 1911,  Occupation retired tinsmith
Surname  ROBINSON 
First Names  Isaiah 
Age  48 Years 
Gender  Male 
Date of Death  20 May 1916 
Religion  Not Listed 
Serial No  5795 
Date of Service and/or Interment  21 May 1916 
Funeral Director  J Weir & Co (2003) Ltd, 70 Ponsonby Road, Ponsonby, AUCKLAND 
What Buried?  Body 
Casket Size   
Casket Depth   
Cemetery  Purewa Cemetery 
Location  Block A Row 11 Plot 036 
Surname  ROBINSON 
First Names  John 
Age  67 Years 
Gender  Male 
Date of Death  14 Jun 1928 
Religion   
Serial No  9427 
Date of Service and/or Interment  16 Jun 1928 
Funeral Director  W H Tongue & Son's, P O Box 8510, Symonds Street, AUCKLAND 
What Buried?  Body 
Casket Size   
Casket Depth   
Cemetery  Purewa Cemetery 
Location  Block E Row 45 Plot 033 
probate filed 11 Jul 1928.  Occupation Retired tinsmith.