Che Guevara was probably more Irish than Mexican, but he was part Mexican. Californio, to be precise.
Two of Guevara’s notable 18th century ancestors included Luis María Peralta, a prominent Spanish landowner in colonial California, and Patrick Lynch, who emigrated from Ireland to the Río de la Plata Governorate.
https://en.wikipedia.org/wiki/Che_Guevara
Kinda like Beto.