*Oppose Chihuahua is the WP:PRIMARYTOPIC; the dog is named after the Mexican state. Also per Wikipedia:NCGN#Mexico (Chihuahua vs Chihuahua, Chihuahua). As for the "other side of the pond" issue, Jersey links to the Island in the English Channel; However, if you ask anyone English speaker outside of the UK what "Jersey" is, they would more than likely say a piece of clothing or a breed of cow  both of which were named after the Island.