A more thorough explanation:

Definition: Collegatary (kəˈlɛɡəˌtɛri) is a person who shares a common legacy with one or more other persons. They are also known as collegatarius (kəˌlɛɡəˈtɛriəs).

Example: John and Jane were both named as collegataries in their grandfather's will, which meant they would share the inheritance equally.

Explanation: In this example, John and Jane are both collegataries because they are sharing the same legacy, which is their grandfather's inheritance. They have equal rights to the inheritance and must share it equally.