Re using the word August in each name. Might well have some thing to do with August meaning noble, stately or exalted. Good name for a potential monarch.
I've known two families that use a certain name in all males of the family, or at least the first son. Sometimes they choose to use a different nickname for a son than the father to keep them from being confused. IE Bill instead of Will. Another family, all boys had to have the same first name, but the two boys go by either initials or a nickname of the middle name.
Makes me glad there's not that expectation in DH's family. We did chose to name our boys for someone in the family but it was nice being able to chose that ourselves.
The name "Kathleen" was very popular as a middle name for the girls of my generation of the family. It wasn't required, just popular. It's my middle name and I have two cousins with the middle name Kathleen. Had our third child been a girl, she too would have had the middle name of Kathleen as well but it didn't work that way.
Instead he got DH's middle name, which is also the first name of one of his uncles and one of my cousins.