O'brien Marriage Records: Groom Firstnames
- Frederick Thomas (1)
- Gareth (2)
- Garrett (3)
- Garrett Richard (1)
- Gary (3)
- Geoffrey (1)
- George (31)
- Gerald (7)
- Gerard (15)
- Gilbert (3)
- Glenn (5)
- Graham (1)
- Gregg (1)
- Gregory (7)
- Greig (2)
- Greville (1)
- Guy (4)
- Harah (1)
- Harles (1)
- Harold (7)
- Harry (6)
- Harvey (2)
- Henry (3)
- Henry Perry (1)
- Henry T (1)
- Herbert (1)
- Howard (1)
- Hubert (2)
- Hugh (5)
- Ian (1)
- Jack (3)
- Jame (1)
- James (160)
- James Daniel (1)
- James Gerard (1)
- James H (1)
- James J (1)
- James Joseph (5)
- James Kenneth (1)
- James M (1)
- James P (3)
- James Patrick (1)
- James Peter (1)
- James S (1)
- James Thomas (1)
- James William (1)
- Jason (2)
- Jeff (2)
- Jeffrey (8)
- Jeremiah (7)
- Jeremiah F (1)
- Jeremiah J (1)
- Jeremiah Joseph (1)
- Jerome (4)
- Jerome John (1)
- Jhn (1)
- John (233)
- John A (1)
- John C (1)
- John F (2)
- John Francis (2)
- John J (4)
- John Joseph (1)
- John M (2)
- John P (2)
- John Patrick (4)
- John Ronald (1)
- John W (1)
- Joseph (90)
- Joseph Charles (1)
- Joseph Gerard (1)
- Joshua (2)
- Justin (1)
- Karl (3)
- Keino (1)
- Keith (10)
- Kennedy (1)
- Kennedy Joseph (1)
- Kenneth (26)
- Kenneth Jamison (1)
- Kenneth P (1)
- Kenneth T (1)
- Kenyon (1)
- Keran (1)
- Kerry (1)
- Kevin (56)
- Kevin James (1)
- Kieran (1)
- L Douglas (1)
- Laurence (1)
- Laurence Edmund (1)
- Lawrance (1)
- Lawrence (9)
- Lawrence Iii (1)
- Lawrence J (2)
- Lawrence T (1)
- Leaford (1)
- Leo (1)
- Leonard (2)
- Liam (4)
- Linsford (1)
- Louis (3)
- Luke (3)
- Malcolm (1)
- Marc (2)
- Mark (12)
- Martin (16)
- Martin G (1)
- Martin Paul (1)
- Matthew (6)
- Matthew James (1)
- Matthew P (1)
- Matthew S (1)
- Maurice (2)
- Merrill (1)
- Mervyn E (1)
- Michael (135)
- Michael J (2)
- Michael John (1)
- Michael L (1)