A more thorough explanation:

EXTRA PATERNAM FAMILIAM

Extra paternam familiam is a Latin term used in law to refer to anything outside the father's family. It is the opposite of intra paternam familiam, which refers to anything within the father's family.

• A child born out of wedlock is considered to be outside the father's family, or extra paternam familiam.
• If a father leaves his estate to his children, but specifies that it should only go to those within his family, he is referring to intra paternam familiam.

These examples illustrate how the term extra paternam familiam is used to describe anything that is not within the father's family. It can refer to children born out of wedlock, inheritance laws, and other legal matters.