In family accounts eTap should have fields to write in first and last names for the individuals in those accounts. There should be at least TWO fields for first names and TWO fields for last names. This would make it so that when you go to make a report of ALL constituents and want to sort it by first and/or last name for all individuals in a family account and all other individual accounts it's possible!
We have no plans to implement this functionality at this time. That being said, our suggestion would be to enter in each person as an Individual account and then use the Household relationship option to combine them into a single household. This way when exporting, you would be able to export the names as you are wanting to see and sort them.