The name is set in stone so please spare your negativity, just looking for a middle name for little man. Zaire is an African name that means river (which you might’ve already known).
Zaire Cayman/ Cayman; both middle names mean “alligator,” which isn't as special for most people, but I just like how they sound. I'm assuming you like unique names since you like Zaire, but if not then you probably won't like any of them.
Maybe you would like to honor a family member with your middle name choice. You can also choose a middle name based upon its meaning or place or origin.
The Western history of giving middle names dates back to Roman times. In the post-Roman Western world, middle names were often saint names, given to both girls and boys at Baptism.
In recent decades, with celebrities going by their middle names, it has become a trend for parents to choose something pretty and meaningful for their daughters that typically compliments the first name. You should choose something really striking and unique, like the name of a planet, an exotic goddess, or a natural element.