Santos

This is actually a unisex name. As of 2024, there are 10010 men and 165 women named Santos in Spain. Source: https://www.ine.es/widgets/nombApell/index.shtml

Also used as a feminine name - rarely used in Spain and more heavily concentrated in much of Latin America (particularly Peru and much of Central America, which can also be applied for Santos as a masculine name).

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Links:
https://forebears.io/forenames/santos (semi-reliable overview)
https://www.idescat.cat/noms/?q=santos (statistics on Santos on its own + combinations in Catalonia, includes data by nationality)
https://www.ine.es/dyngs/INEbase/es/operacion.htm?c=Estadistica_C&cid=1254736177009&menu=resultados&idp=1254734710990 (Spain - nationality data found by typing name and clicking 'País de nacionalidad')

Also used in Portuguese, especially in Portugal and Portuguese-speaking areas of Africa: https://forebears.io/forenames/santos

Also Galician: http://www.ige.eu/igebdt/esq.jsp?idioma=gl&ruta=onomast/nomes.jsp
https://gl.wikipedia.org/wiki/Lista_de_nomes_masculinos_en_galego

The name Santos was given to 214 boys born in the US in 2016.
82.61 percent of people with the first name Santos are male.