Legal Definitions - filius mulieratus

filius mulieratus

Filius mulieratus is a Latin term used in historical law. It refers to the eldest son of a woman who had an illegitimate son by the same father before having a legitimate son. In other words, it is a legitimate son whose older brother is illegitimate.

• John is the filius mulieratus of Mary. Mary had a son named Tom out of wedlock before marrying John's father and having John.
• Elizabeth had a son named Jack with her partner before getting married and having a son named William. William is the filius mulieratus of Elizabeth.

These examples illustrate the definition of filius mulieratus. In both cases, the women had an illegitimate son before having a legitimate son with the same father. The legitimate sons, John and William, are considered filius mulieratus because they have an older brother who is illegitimate.