I couldn't find any Rouds or Ronds, but I found this possibility:

Charlotte Gladston Departed 5 Nov 1870 arrived Lyttelton 21 Jan 1871

Surname First Age Occupation

Ronde Edmund 3

Ronde Elizabeth 26

Ronde Elizabeth 10m

Ronde George 31 Farm labourer

Ronde George 5

Ronde Mary Ann 7

It is a pity there was no county of origin given with this list.

John