Where does “San Diego–Tijuana” come from?

San Diego–Tijuana (English) comes from English Tijuana, from Spanish Tijuana, from Kumeyaay Tiwan.

San Diego–Tijuana (English): An international metropolitan region centered on the cities of San Diego, California and Tijuana, Baja California, and composed of the counties and municipalities of Rosarito Beach, San Diego, Tecate, and Tijuana

Definitions

An international metropolitan region centered on the cities of San Diego, California and Tijuana, Baja California, and composed of the counties and municipalities of Rosarito Beach, San Diego, Tecate, and Tijuana

Ancestry of “San Diego–Tijuana”, step by step

San Diego–Tijuana traces back through two separate lines of ancestry.

via English Tijuana

Step	Language	Word	Meaning
1	English	Tijuana	—
2	Spanish	Tijuana	—
3	Kumeyaay	Tiwan	—

via English San Diego

Step	Language	Word	Meaning
1	English	San Diego	Any of several other places also named after Saint Diego
2	Spanish	San Diego	Saint Didacus

Every word from Kumeyaay Tiwan →Every word from Spanish Tijuana →Every word from English Tijuana →