About the De Beauregard surname
The surname De Beauregard has a primarily toponymic formation. The structure of the surname suggests a locational or toponymic formation linked to a place, estate, or landscape feature. The surname may therefore originally have identified a person by place of origin, residence, or a feature of the landscape. The opening particle in De Beauregard is part of the surname's structure. In French surnames, forms of this kind are often associated with a place, estate, landscape feature, or older nickname.
Pronunciation:
De-bor-gar/də-boʁɡaʁ/