O'brien Marriage Records: Groom Firstnames
- Tatrick Vincent (1)
- Terence (11)
- Terence P (1)
- Terrance (1)
- Terrence (8)
- Terrence William James (1)
- Thedoroee (1)
- Theodore (1)
- Thoams (1)
- Thomaas (1)
- Thomas (134)
- Thomas Aloysious (1)
- Thomas C (1)
- Thomas Edward (1)
- Thomas F (1)
- Thomas Frances (1)
- Thomas J (4)
- Thomas J. (1)
- Thomas Jessie (1)
- Thomas John (1)
- Thomas Patrick (1)