Here is the index entry for their marriage in NZ, thus confirming the spelling of Rond:

1886/3149 Elizabeth Rond William John Blunt

There is a death index entry for an Elizabeth Blunt as well:
1927/8027 Blunt Elizabeth 51Y
but that age would have given this Elizabeth a birth date of 1876, making her 10 years of age at her wedding in 1886. Either there is another Elizabeth Blunt, or her age is wrongly recorded.