A more thorough explanation:

de rationabili parte bonorum

De rationabili parte bonorum is a legal term that means "of reasonable share of goods." It refers to a writ that allowed the wife and children of a deceased man to recover a fair portion of his belongings from his executors after his debts were paid. This writ was usually based on custom rather than general law.

An example of de rationabili parte bonorum would be if a man died and left behind a large estate. His wife and children could use this writ to claim a reasonable share of his belongings from his executors, after his debts were paid.

Another example would be if a man died without a will, and his family used this writ to claim a fair portion of his estate.

These examples illustrate how de rationabili parte bonorum was used to ensure that a deceased person's family received a fair share of their belongings, even if there was no will or legal precedent to guide the distribution of the estate.