Urban legends from the Netherlands, France, Germany, and England, speak of women with the heads of pigs.  Similar tales are still extant in the urban legends of the United States.

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Opening music from https://filmmusic.io. "Dark Child" by Kevin MacLeod (https://incompetech.com). License: CC BY (http://creativecommons.org/licenses/by/4.0/)Closing music by Soma.

SOURCES

London Examiner, February 26, 1815.

“Lady Hyde Parker's masqued fete, &c.” London Morning Post, May 31, 1815.

“Summary account of the prophetic origin and history of Joanna Southcott,” The Exeter Flying Post, September 8, 1814.

Bondeson, Jan. The Two-Headed Boy, and Other Medical Marvels. Ithaca, NY: Cornell University Press, 2000.

— and Arie Molenkamp. “The Countess Margaret of Henneberg and her 365 children.” Journal of the Royal Society of Medicine 89 (December 1996).

Chambers, Robert. “'Modern myths' – the pig-faced lady,” Chambers' Edinburgh Journal, August 17, 1850.

de Rochechouart, Françoise-Athénaïs, Marquise de Montespan. Memoirs of Madame la Marquise de Montespan. Boston: L.C. Page and Company, 1899.

"A Certaine Relation of the Hog-faced Gentlewoman...” https://quod.lib.umich.edu/e/eebo/A12308.0001.001?rgn=main;view=fulltext

"A Monstrous Shape, or a Shapelesse Monster.” https://quod.lib.umich.edu/e/eebo/A10066.0001.001/1:1?rgn=div1;view=fulltext

“The Long-Nos'd Lass.”https://en.wikisource.org/wiki/The_Long-Nos%27d_Lass

https://referenceworks.brillonline.com/entries/encyclopedia-of-the-medieval-chronicle/tabula-egmundana-SIM_02396?lang=en