Is it possible to count and split subcategories?

I have a category ‘photographers’ and the subcategories are photographer names. What I want to do is split the subcategory after every 4th photographer name into a new list so I can float the lists of 4 next to each other?

I want to display the photographers by count and not display more than 16.

Is this possible to do with a conditional statement? Is it even possible to do with subcategories or do I need to create a custom taxonomy list?

I’m not great with writing php loops so any help would be much appreciated, thank you!