Antony Armstrong-Jones, 1st Earl of Snowdon is your second great aunt's brother's wife's second cousin's husband's niece's husband's first cousin twice removed's ex-husband.
You → Millicent Susan Whiting (your mother)→ show 19 relatives → Princess Margaret, Countess of Snowdon (her daughter) → Antony Armstrong-Jones, 1st Earl of Snowdon (her ex-husband)
