Hi Valeta,
In this case:
The death notice is attached to the correct profile, for the following reasons:
1. Age corresponds
2. Need to consider the wife's details and especially DN, where the children corresponds to the children on his. Hers: https://www.familysearch.org/ark:/61903/3:1:3Q9M-CS92-ZWLL-B?i=774&...
3. His mother's maiden name is also given on his DN (not always the case but needs to be mentioned)
I don't see anything incorrect with this profile at all. :/ Perhaps the other 2 wives attached but there are no children for them - in my mind therefore not "going anywhere" - and these type of "maybe late marriages" are very hard to trace when there are no children especially....
In general:
People did not have 2 children with the same names where both survived simultaneously. Cousins did have the same names but then they would have different mothers (in the cases where the names of the fathers actually are the same, this will only be the case in 3+ generations later... so one cannot only look at one profile at a time, but all the profiles in total, where exactly it fits in based on the differences in names of all the children)
The general naming convention when given names of children: Daughters - mothers mother, fathers mother, mother, mothers mothers mother, fathers mothers mother, +++. Sons - fathers father, mothers father, father, fathers fathers father, +++. This is general, for sometimes when children die young the names will not be in that order, normal complexity out of order, or missing a name.
In later years, and recently of course, people are moving away from this. But for the era 1800-1859 of this JJ e8f3 you will - by looking at the children's name, hopefully see that it cannot be any other than this one!
You should look at the names and birth order of the children actually first, you cannot look at names of parents or their parents profiles only. If you have another JJ van Staden, you will see that the names of his daughters will not correspond to this ones (except in the very rare instances where it is close cousins of same lineages marrying perhaps, but even then there will be obvious small differences.) Gist of what I am sharing.