I have drawn a blank on David Ross and Alexander Ross brother's from Scotland and both carpenters. David doesn't seem to have married lived with family in Dunedin New Zealand. Alexander Ross married Anne/Annie Doyle in New Zealand. Alexander Ross died in Dunedin hospital in March 1905 aged 55yrs. He only had one child being Anne/ie Elizebath Ross.
David Ross died in Dunedin New Zealand at 79yrs 11th April 1927. Any help would be wonderful have no idea what ship they came on or if even together or if other family memebers came with them, unsure of parents names can't even find those sadly, so maybe other children as well.