octogamy

Etymology
From. Compare 🇨🇬.

Noun

 * 1) The state of having eight spouses simultaneously.
 * 2) * 1888, Florence Nightingale, letter to Maude Verney dated 2 February 1888, published in Lynn McDonald, Florence Nightingale: An Introduction to Her Life and Family (2010), page 713:
 * The best wardmaster in Scutari had eight wives—I mean eight wives alive—at different stations. He was tried when he came home at Warwick Assizes for what was euphoniously called bigamy, but was octogamy.
 * 1) * 2011, Joyce E. Kelley, "Beating them to the Punch: satirizing sensation from the 1860s comic journal to Braddon's The Doctor's Wife", Victorians: A Journal of Culture and Literature, Spring 2011:
 * The author devotes almost an entire page of the essay to rewriting [Mary Elizabeth] Braddon's fiction, replacing bigamy with octogamy and inventing a sensation author who, writing between meals, creates three murderous polygamist heroines in one day--including one who, having poisoned twenty-seven lovers, flies off "to sunny Italy ... with the stable boy."
 * The author devotes almost an entire page of the essay to rewriting [Mary Elizabeth] Braddon's fiction, replacing bigamy with octogamy and inventing a sensation author who, writing between meals, creates three murderous polygamist heroines in one day--including one who, having poisoned twenty-seven lovers, flies off "to sunny Italy ... with the stable boy."