A gift beyond what is actually due; an addition or superfluity. / An a fortiori occurrence, as a result of another effort without significant additional effort.

Occurring as a natural consequence or result; attendant; consequential. / (rare) Forming a proposition that follows from one already proved.

plural of corollary

Of or relating to corollaries.

As a corollary.

(law) The custody and support of children in divorce proceedings.