O'brien Marriage Records: Groom Firstnames
- Patrick (81)
- Patrick Brian (1)
- Patrick Henry (2)
- Patrick J (3)
- Patrick James (1)
- Patrick Michael (3)
- Patrick R (1)
- Patrick T (1)
- Patrick T A (1)
- Paul (24)
- Paul J (1)
- Paul Valentine (1)
- Pedro (2)
- Peter (14)
- Peter J (1)