When you first download Eggy you'll have 10 categories in your Personal space.
With the free version of Eggy you can add another 2, to have a total of 12 categories.
But with Eggy Pro, you can have up to 100 categories across your spaces.
And you can name those categories whatever you like.
So in your Family space, you can create and name a category for every member of the family.
If you do create any custom categories, you can always go in and edit to rename them.
Here's how:
Go to the Spaces screen
Tap on the space that you want to change a category in
Tap on the category you want to rename
Tap on the three dots in the top right corner
Tap 'Edit category'
Follow the prompts, make your changes and tap Save
You can also delete categories that you no longer want and reorder categories in any of the spaces that you're an admin/owner of.