A more thorough explanation:

Nonagium is a term used in history to describe the ninth part of a deceased person's personal property. This portion was sometimes paid to the parish clergy for religious purposes.

• When John passed away, his estate was divided among his heirs, but a nonagium was set aside to be given to the local church.
• The nonagium was a way for people to support their religious community even after they had passed away.

These examples show how the nonagium was a portion of a person's estate that was designated for religious purposes. It was a way for people to support their local church and community even after they had died.