The Spanish word "chino" has multiple interesting etymological origins that have merged over time. In its meaning of "Chinese," it comes from the Chinese word "Qín" (秦), which referred to the Qin dynasty - the first imperial dynasty of China. This term became widely used to refer to China and Chinese people.

Interestingly, "chino" in Spanish can also mean "curly-haired," which may have multiple influences: one from the Quechua word "čína" meaning "female servant" (as many indigenous servants had curly hair), and another possible connection to Spanish "cochino" (pig) and the call word "chin" used for pigs, perhaps referring to the coarse, curly nature of pig hair.

A related Spanish word is "cochino," meaning "pig." While this might seem unexpected, the connection lies in the curly-haired meaning of "chino" - both words share a reference to coarse, curly hair. The word "chin" is also related, being a call word used to summon pigs in Spanish.

While not directly related, English speakers might recognize "China" as cognate with the Spanish "chino" in its meaning of "Chinese," as both ultimately derive from the Chinese dynasty name "Qín." However, it's important to note that the English and Spanish terms developed independently from the same Chinese source.