Kingston
- O'Neill, Ivy
- O'Neill, Julia
- O'Neill, Michael
- O'Regan, Gertrude
- O'Regan, John
- O'Reilly, Agnes
- O'Reilly, Anna
- O'Reilly, Cornelius
- O'Reilly, Elizabeth
- O'Reilly, John
- O'Reilly, Terence
- O'Reilly, Terry
- O'Reily, Daniel
- O'Rourke, Patrick
- O'Shaughnessy, Derek
- O'Shaughnessy, John
- O'Shaughnessy, Michael
- O'Shaughnessy, Patrick
- O'Shaughnessy, Paul
- O'Shea, $
- O'Shea, Carole
- O'Shea, Deborah
- O'Shea, Frances
- O'Shea, James
- O'Shea, Patrick
- O'Shea, Patrick
- O'Shea, Sarah
- O'Sullivan, Daniel
- O'Sullivan, Edmund
- O'Sullivan, Frances
- O'Sullivan, Henry
- O'Sullivan, Hondria
- O'Sullivan, Maggie
- O'Sullivan, Maurice
- O'Sullivan, Michael
- O'Sullivan, Walter
- O'Toole, Bridget
- Oak, Rachael
- Oake, Sarah
- Oakes, Agnes
- Oakes, Alfred
- Oakes, Daisy
- Oakes, David
- Oakes, Edward
- Oakes, Frank
- Oakes, Frederick
- Oakes, Harry
- Oakes, Jessie
- Oakes, Margaret
- Oakes, Rose