| Authorised form of name | Perez de Guzman; Pedro Alonzo (1724 - 1779); Duke of Medina-Sidonia |
| Other forms of name | Pedro Alonzo Perez |
| Other forms of surname | De Guzman |
| Dates | 1724 - 1779 |
| Nationality | Spanish |
| Membership category | Fellow |
| Date of election | 09/11/1749 |
| Source | Sources:
Bulloch's Roll |
| Code | NA2309 |
Archives associated with this Fellow
| RefNo | Title | Date |
| EC/1749/15 | Perez de Guzman, Pedro Alonzo, Duke of Medina-Sidonia: certificate of election to the Royal Society | 9 November 1749 |