Nafissa bint Abdullah (Queen Nafissa) is your second great aunt's brother's wife's second cousin once removed's ex-wife's sister's ex-husband's niece's husband's grandson's wife's second great uncle's wife.
You → Millicent Susan Whiting (your mother) → Francis Henry Thompson (her father) → Margaret Mary Dobson (his mother) → George Dobson (her brother) → Martha Cosgrove (his wife) → John Cosgrove (her brother) → Emma Dorcas Palmer (his wife) → William Orpen Palmer (her father) → Margaret Orpen (his mother) → Abraham Edward O'Connor Orpen (her brother) → Edward Chatterton Orpen (his son) → Edith Rosamund Orpen (his daughter) → Charles Loraine Carlos Clarke (her son) → Elizabeth "Betty" Thursby (his ex-wife) → Jean Cubitt (her sister) → Sir Robert George Maxwell Throckmorton, 11th Baronet (her ex-husband) → Elizabeth Ursula Arienwen D'Abreu (his sister) → Felicity Ann Dahl (her daughter) → Roald Dahl (her husband) → Tessa Dahl (his daughter) → <private> Donovan (her son) → Princess Raiyah bint Hussein (his wife) → King Hussein of Jordan (her father) → Talal bin Abdullah, King of Jordan (his father) → King Abdullah of Jordan (his father) → Ali bin Hussein, Hejaz (his brother) → Nafissa bint Abdullah (Queen Nafissa) (his wife)