Hi @gisgeek, if your requirement is to keep the longer name "Lake Okataina/Te Moana..." as "LakeName" value after aggregating or dissolving the two features (#392 and #393), try sorting the features by string length descending beforehand. You can use the StringLengthCalculator to get the lenght of a string (i.e. the number of characters).
If you don't want to change the original order of the lakes, get string length of each lake name as well, generate a list that stores input attributes when aggregating, sort the list by lake name length descending with the ListSorter, and then extract the first element of the list with the ListIndexer.
Optionaly after aggregation (with the list option),sort the list on the lake name and use conditional values in the attribute manager for the specific case of lake Okataina to map the lake name attribute.
Hope this helps.
Maybe also set a list in the Dissolver, then use a ListConcatenator to concatenate all of those names together - if you want all of the names in a single attribute.
Thanks for your suggestions I found the Generate List in the Dissolver did the job,exposed the elements on my Lakes List and then used the conditional values to get a list of names that included the full names of the lakes.