Sylvia Irene Sandeman

(died 1972) (1889–1972)

Parents

• Walter Albert Sandeman

Children

• Nial Arthur Ramleh O'Neill
• Con O'Neill
• Phelim O’Neill, 2nd Baron Rathcavan

Siblings

• Henry Gerard Walter Sandeman

Partners

• Hugh O'Neill, 1st Baron Rathcavan