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If you look in the French phone directory, you can find a number of people with an unusual surname: "Snp". Where does it come from? (thread) https://www.pagesjaunes.fr/pagesblanches/recherche?quoiqui=snp&ou=&univers=pagesblanches&idOu=
Most of those I could find have North African first name (e.g Djemila). This dates back to the colonisation of Algeria, colonised by the French in 1830.
In 1882, the French decide that all "indigenous" people of Algeria needed to be registered in the civil register. Problems: 1. they didn't have surnames in the French sense, they're called "son of etc". 2. There is no official way to transcribe Arabic sounds in written French.
This led to defiant Algerians insulting civil registrars and the latter writing down the insult as their last name. Some people received the last name "Demaghelatrous" (goathead)
When they refused to give a last name, the registrar would write "SNP" (sans nom patronymique - "without a last name") . This became their last name in official papers.
Many people in Algeria have changed their name since decolonisation to get rid of this (e.g "goathead"), but a number of people of North African origin living in France still have "Snp" (no last name) as their official last name. https://www.jeuneafrique.com/165948/societe/alg-rie-changer-de-nom-pour-tirer-un-trait-sur-le-pass-colonial/
Other family names given by the French were especially hard to hold: "buttocks", "arse", or diverse excrements.
https://www.persee.fr/docAsPDF/onoma_0755-7752_2013_num_55_1_1782.pdf
https://www.persee.fr/docAsPDF/onoma_0755-7752_2013_num_55_1_1782.pdf
